Braftovi (encorafenib) dosing, indications, interactions, adverse effects, and more (original) (raw)

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Contraindicated (8)

• doravirine
  encorafenib will decrease the level or effect of doravirine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of doravirine with a CYP3A inducer may decrease doravirine plasma concentrations and/or effects. Potential for loss of virologic response and possible resistance to doravirine.
• dronedarone
  encorafenib and dronedarone both increase QTc interval. Contraindicated.
• elagolix
  encorafenib will increase the level or effect of elagolix by Other (see comment). Contraindicated.
• isavuconazonium sulfate
  isavuconazonium sulfate will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Monitor if isavuconazonium (a CYP3A4 substrate) is coadministered with encorafenib (a CYP3A4 inhibitor and inducer).encorafenib, isavuconazonium sulfate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Monitor if isavuconazonium (a CYP3A4 substrate) is coadministered with encorafenib (a CYP3A4 inhibitor and inducer).
• lonafarnib
  encorafenib, lonafarnib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Lonafarnib is a sensitive CYP3A4 substrate that is contraindicated with strong or moderate CYP3A4 inhibitors or inducers. Encorafenib is both a CYP3A4 inhibitor and an inducer.
• mavacamten
  encorafenib decreases levels of mavacamten by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.
• pacritinib
  encorafenib, pacritinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Encorafenib (a CYP3A4 inhibitor and inducer) may increase or decrease levels of pacritinib.
• voriconazole
  encorafenib and voriconazole both increase QTc interval. Contraindicated.

Serious (233)

• adagrasib
  adagrasib, encorafenib. Either increases effects of the other by QTc interval. Avoid or Use Alternate Drug. Each drug prolongs the QTc interval, which may increased the risk of Torsade de pointes, other serious arryhthmias, and sudden death. If coadministration unavoidable, more frequent monitoring is recommended for such patients.
• alfuzosin
  alfuzosin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• amiodarone
  encorafenib and amiodarone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• amisulpride
  encorafenib and amisulpride both increase QTc interval. Avoid or Use Alternate Drug. ECG monitoring is recommended if coadministered.
• amitriptyline
  encorafenib and amitriptyline both increase QTc interval. Avoid or Use Alternate Drug.
• anagrelide
  encorafenib and anagrelide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• apalutamide
  apalutamide will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• apomorphine
  apomorphine and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• aprepitant
  aprepitant will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• aripiprazole
  aripiprazole and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• arsenic trioxide
  encorafenib and arsenic trioxide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• artemether
  encorafenib and artemether both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• asenapine
  encorafenib and asenapine both increase QTc interval. Avoid or Use Alternate Drug.
• asenapine transdermal
  asenapine transdermal and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• atazanavir
  atazanavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• atomoxetine
  atomoxetine and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• avapritinib
  encorafenib, avapritinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of avapritinib with moderate or strong CYP3A4 inhibitors. If coadministration of avapritinib with a moderate inhibitor cannot be avoided, reduce avapritinib starting dose (see drug monograph Dosage Modifications).
• bedaquiline
  bedaquiline and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• bosentan
  bosentan will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• buprenorphine
  encorafenib and buprenorphine both increase QTc interval. Avoid or Use Alternate Drug.
• buprenorphine buccal
  buprenorphine buccal and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• buprenorphine subdermal implant
  buprenorphine subdermal implant and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• buprenorphine transdermal
  buprenorphine transdermal and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• buprenorphine, long-acting injection
  buprenorphine, long-acting injection and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• capivasertib
  encorafenib, capivasertib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib may inhibit or induce CYP3A. .
• carbamazepine
  carbamazepine will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• ceritinib
  ceritinib and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.ceritinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• chloramphenicol
  chloramphenicol will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• chlorpromazine
  encorafenib and chlorpromazine both increase QTc interval. Avoid or Use Alternate Drug.
• ciprofloxacin
  encorafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.
• citalopram
  encorafenib and citalopram both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• clarithromycin
  clarithromycin will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.clarithromycin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• clomipramine
  encorafenib and clomipramine both increase QTc interval. Avoid or Use Alternate Drug.
• clozapine
  clozapine and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• cobicistat
  cobicistat will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• conivaptan
  conivaptan will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concurrent use with CYP3A4 substrates. Delay initiation of drugs metabolized by CYP3A4 for at least 7 days following the discontinuation of conivaptan.
• crizotinib
  crizotinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.crizotinib and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• cyclosporine
  cyclosporine will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• dabrafenib
  dabrafenib will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• danazol
  danazol will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• daridorexant
  encorafenib, daridorexant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib, a CYP3A4 inducer and inhibitor, may increase or decrease daridorexant levels.
• darunavir
  darunavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• dasatinib
  dasatinib and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• degarelix
  degarelix and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• desflurane
  desflurane and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• desipramine
  encorafenib and desipramine both increase QTc interval. Avoid or Use Alternate Drug.
• deuruxolitinib
  encorafenib decreases levels of deuruxolitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of deuruxolitinib with strong CYP3A4 inducers.
• dienogest/estradiol valerate
  encorafenib will decrease the level or effect of dienogest/estradiol valerate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Encorafenib can cause fetal harm. Advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.
• diltiazem
  diltiazem will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• disopyramide
  encorafenib and disopyramide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• dofetilide
  encorafenib and dofetilide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.dofetilide increases toxicity of encorafenib by QTc interval. Avoid or Use Alternate Drug.
• dolasetron
  dolasetron and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• donepezil
  donepezil and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• doxepin
  doxepin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• dronedarone
  dronedarone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• droperidol
  encorafenib and droperidol both increase QTc interval. Avoid or Use Alternate Drug.
• efavirenz
  efavirenz will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.efavirenz and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.encorafenib and efavirenz both increase QTc interval. Avoid or Use Alternate Drug.
• elacestrant
  encorafenib, elacestrant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib inhibits and induces CYP3A4. Avoid with sensitive CYP3A4 substrates.
• eliglustat
  encorafenib and eliglustat both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• elvitegravir/cobicistat/emtricitabine/tenofovir DF
  elvitegravir/cobicistat/emtricitabine/tenofovir DF will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• entrectinib
  encorafenib and entrectinib both increase QTc interval. Avoid or Use Alternate Drug.encorafenib will decrease the level or effect of entrectinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• enzalutamide
  enzalutamide will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• eribulin
  encorafenib and eribulin both increase QTc interval. Avoid or Use Alternate Drug.eribulin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• erythromycin base
  erythromycin base will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and erythromycin base both increase QTc interval. Avoid or Use Alternate Drug.
• erythromycin ethylsuccinate
  erythromycin ethylsuccinate will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and erythromycin ethylsuccinate both increase QTc interval. Avoid or Use Alternate Drug.
• erythromycin lactobionate
  erythromycin lactobionate will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and erythromycin lactobionate both increase QTc interval. Avoid or Use Alternate Drug.
• erythromycin stearate
  erythromycin stearate will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and erythromycin stearate both increase QTc interval. Avoid or Use Alternate Drug.
• escitalopram
  escitalopram increases toxicity of encorafenib by QTc interval. Avoid or Use Alternate Drug.
• ethinylestradiol
  encorafenib will decrease the level or effect of ethinylestradiol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Since encorafenib can cause fetal harm, advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.
• etrasimod
  etrasimod, encorafenib. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Risk of additive immune system effects with etrasimod has not been studied in combination with antineoplastic, immune-modulating, or noncorticosteroid immunosuppressive therapies. Avoid coadministration during and in the weeks following administration of etrasimod. .
• etravirine
  etravirine will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• fedratinib
  encorafenib will decrease the level or effect of fedratinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Effect of coadministering a moderate CYP3A4 inducer with fedratinib has not been studied.
• fexinidazole
  fexinidazole and encorafenib both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of fexinidazole with drugs known to block potassium channels or prolong QT interval.fexinidazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Fexinidazole inhibits CYP3A4. Coadministration may increase risk for adverse effects of CYP3A4 substrates.
• finerenone
  encorafenib will decrease the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• fingolimod
  fingolimod and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• flecainide
  encorafenib and flecainide both increase QTc interval. Avoid or Use Alternate Drug.
• fluconazole
  fluconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and fluconazole both increase QTc interval. Contraindicated.
• fluoxetine
  encorafenib and fluoxetine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• fluvoxamine
  encorafenib and fluvoxamine both increase QTc interval. Avoid or Use Alternate Drug.
• fosamprenavir
  fosamprenavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• fosaprepitant
  fosaprepitant will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• foscarnet
  encorafenib and foscarnet both increase QTc interval. Avoid or Use Alternate Drug.
• fosphenytoin
  fosphenytoin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• fostamatinib
  fostamatinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• fruquintinib
  encorafenib will decrease the level or effect of fruquintinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with moderate CYP3A4 inducers is unavoidable, continue to administer fruquintinib at recommended dosage.
• ganaxolone
  encorafenib will decrease the level or effect of ganaxolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of ganaxolone with moderate or strong CYP3A4 inducers. If coadministration unavoidable, consider increasing ganaxolone dose; however, do not exceed maximum daily dose for weight.
• gemifloxacin
  encorafenib and gemifloxacin both increase QTc interval. Avoid or Use Alternate Drug.
• gemtuzumab
  encorafenib and gemtuzumab both increase QTc interval. Avoid or Use Alternate Drug.
• gilteritinib
  encorafenib and gilteritinib both increase QTc interval. Avoid or Use Alternate Drug.
• givinostat
  encorafenib and givinostat both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid coadministration, obtain ECGs when initiating, during concomitant use, and as clinically indicated. Withhold if QTc interval >500 ms or a change from baseline >60 ms.
• glasdegib
  encorafenib and glasdegib both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, monitor for increased risk of QTc interval prolongation.
• goserelin
  encorafenib and goserelin both increase QTc interval. Avoid or Use Alternate Drug.
• granisetron
  encorafenib and granisetron both increase QTc interval. Avoid or Use Alternate Drug.
• grapefruit
  grapefruit will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• haloperidol
  encorafenib and haloperidol both increase QTc interval. Avoid or Use Alternate Drug.
• histrelin
  encorafenib and histrelin both increase QTc interval. Avoid or Use Alternate Drug.
• hydroxychloroquine sulfate
  encorafenib and hydroxychloroquine sulfate both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.hydroxychloroquine sulfate and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• hydroxyzine
  encorafenib and hydroxyzine both increase QTc interval. Avoid or Use Alternate Drug.
• ibutilide
  encorafenib and ibutilide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• idelalisib
  idelalisib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• iloperidone
  iloperidone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and iloperidone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• imatinib
  imatinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• imipramine
  encorafenib and imipramine both increase QTc interval. Avoid or Use Alternate Drug.
• infigratinib (DSC)
  encorafenib will decrease the level or effect of infigratinib (DSC) by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• inotuzumab
  encorafenib and inotuzumab both increase QTc interval. Avoid or Use Alternate Drug.
• isoflurane
  encorafenib and isoflurane both increase QTc interval. Avoid or Use Alternate Drug.
• isoniazid
  isoniazid will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• itraconazole
  itraconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and itraconazole both increase QTc interval. Avoid or Use Alternate Drug.
• ivosidenib
  ivosidenib and encorafenib both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of QTc prolonging drugs with ivosidenib or replace with alternate therapies. If coadministration of a QTc prolonging drug is unavoidable, monitor for increased risk of QTc interval prolongation.
• ketoconazole
  ketoconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If use is unavoidable, reduce encorafenib dose to 150 mg/day if current dose is 450 mg/day and 75 mg/day if current dose is 150-300mg/day. After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• lapatinib
  encorafenib and lapatinib both increase QTc interval. Avoid or Use Alternate Drug.
• lefamulin
  lefamulin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• lemborexant
  encorafenib, lemborexant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of lemborexant with drugs that may inhibit or induce CYP3A.
• lenacapavir
  encorafenib will decrease the level or effect of lenacapavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of lenacapavir with moderate CYP3A4 inducers.lenacapavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the current encorafenib dose. After the inhibitor has been discontinued for 3 to 5 elimination half-lives, resume encorafenib dose that was taken before initiating the CYP3A4 inhibitor.
• leniolisib
  encorafenib, leniolisib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib, an inhibitor and inducer of CYP3A4, may either increase or decrease leniolisib systemic exposure .
• lenvatinib
  encorafenib and lenvatinib both increase QTc interval. Avoid or Use Alternate Drug.
• letermovir
  letermovir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• leuprolide
  encorafenib and leuprolide both increase QTc interval. Avoid or Use Alternate Drug.
• levofloxacin
  encorafenib and levofloxacin both increase QTc interval. Avoid or Use Alternate Drug.
• levoketoconazole
  levoketoconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If use is unavoidable, reduce encorafenib dose to 150 mg/day if current dose is 450 mg/day and 75 mg/day if current dose is 150-300mg/day. After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• levonorgestrel intrauterine
  encorafenib will decrease the level or effect of levonorgestrel intrauterine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Since encorafenib can cause fetal harm, advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.
• levonorgestrel oral/ethinylestradiol/ferrous bisglycinate
  encorafenib will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Encorafenib can cause fetal harm. Advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.
• levonorgestrel transdermal
  encorafenib will decrease the level or effect of levonorgestrel transdermal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Since encorafenib can cause fetal harm, advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.
• lithium
  encorafenib and lithium both increase QTc interval. Avoid or Use Alternate Drug.
• lofexidine
  encorafenib and lofexidine both increase QTc interval. Avoid or Use Alternate Drug.
• lopinavir
  lopinavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and lopinavir both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• lorlatinib
  encorafenib will decrease the level or effect of lorlatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of lorlatinib with moderate CYP3A inducers. If unable to avoid, monitor ALT, AST, and bilirubin as recommended.lorlatinib will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• lumateperone
  encorafenib will decrease the level or effect of lumateperone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• lumefantrine
  encorafenib and lumefantrine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• lurbinectedin
  encorafenib, lurbinectedin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Lurbinectedin is a CYP3A4 substrate. Coadministration with encorafenib (a CYP3A4 inhibitor and inducer) may increase or decrease plasma levels. Monitor for lurbinectedin toxicities or possible decreases in efficacy.
• macimorelin
  encorafenib and macimorelin both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• maprotiline
  encorafenib and maprotiline both increase QTc interval. Avoid or Use Alternate Drug.
• mefloquine
  encorafenib and mefloquine both increase QTc interval. Avoid or Use Alternate Drug.
• methadone
  encorafenib and methadone both increase QTc interval. Avoid or Use Alternate Drug.
• midostaurin
  encorafenib and midostaurin both increase QTc interval. Avoid or Use Alternate Drug.
• mifepristone
  mifepristone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and mifepristone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• mirtazapine
  encorafenib and mirtazapine both increase QTc interval. Avoid or Use Alternate Drug.
• mitotane
  mitotane will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• moxifloxacin
  encorafenib and moxifloxacin both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• nafcillin
  nafcillin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• nefazodone
  nefazodone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• nelfinavir
  nelfinavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• netupitant/palonosetron
  netupitant/palonosetron will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• nilotinib
  nilotinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and nilotinib both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• nirmatrelvir
  nirmatrelvir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration owing to potential risk of serious adverse events (eg, QT interval prolongation).
• nirmatrelvir/ritonavir
  nirmatrelvir/ritonavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration owing to potential risk of serious adverse events (eg, QT interval prolongation).
• nirogacestat
  encorafenib will decrease the level or effect of nirogacestat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• nortriptyline
  encorafenib and nortriptyline both increase QTc interval. Avoid or Use Alternate Drug.
• octreotide
  encorafenib and octreotide both increase QTc interval. Avoid or Use Alternate Drug.
• ofloxacin
  encorafenib and ofloxacin both increase QTc interval. Avoid or Use Alternate Drug.
• olanzapine
  encorafenib and olanzapine both increase QTc interval. Avoid or Use Alternate Drug. Limited data, including some case reports, suggest that olanzapine may be associated with a significant prolongation of the QTc interval in rare instances
• olutasidenib
  encorafenib will decrease the level or effect of olutasidenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Strong or moderate CYP3A inducers decrease olutasidenib (a CYP3A4 substrate) plasma concentrations and efficacy.
• omaveloxolone
  encorafenib, omaveloxolone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib may increase or decrease systemic exposure of omeveloxolone. .
• ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC)
  ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC) will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• ondansetron
  encorafenib and ondansetron both increase QTc interval. Avoid or Use Alternate Drug.
• osimertinib
  encorafenib and osimertinib both increase QTc interval. Avoid or Use Alternate Drug.
• oxaliplatin
  encorafenib and oxaliplatin both increase QTc interval. Avoid or Use Alternate Drug.
• palbociclib
  palbociclib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• palifermin
  palifermin increases toxicity of encorafenib by Other (see comment). Avoid or Use Alternate Drug. Comment: Palifermin should not be administered within 24 hr before, during infusion of, or within 24 hr after administration of antineoplastic agents. Coadministration of palifermin within 24 hr of chemotherapy resulted in increased severity and duration of oral mucositis.
• paliperidone
  encorafenib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• panobinostat
  encorafenib and panobinostat both increase QTc interval. Avoid or Use Alternate Drug.
• pasireotide
  encorafenib and pasireotide both increase QTc interval. Avoid or Use Alternate Drug.
• pazopanib
  encorafenib and pazopanib both increase QTc interval. Avoid or Use Alternate Drug.
• pemigatinib
  encorafenib, pemigatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of pemigatinib (a CYP3A4 substrate) with encorafenib (a CYP3A4 inducer and inhibitor) may increase or decrease plasma levels or effects of pemigatinib.
• pentamidine
  encorafenib and pentamidine both increase QTc interval. Avoid or Use Alternate Drug.
• pexidartinib
  encorafenib, pexidartinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of pexidartinib (a CYP3A4 substrate) with encorafenib (a CYP3A4 inducer and inhibitor) may increase or decrease plasma levels or effects of pexidartinib.
• phenobarbital
  phenobarbital will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• phenytoin
  phenytoin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• pimavanserin
  encorafenib and pimavanserin both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• pimozide
  encorafenib and pimozide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• pirtobrutinib
  encorafenib will decrease the level or effect of pirtobrutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration unavoidable, increase pirtobrutinib dose to 300 mg qDay (if dose is 200 mg qDay) or increase pirtobrutinib dose by 50 mg (if current pirtobrutinib dose is 50 mg or 100 mg qDay).
• pitolisant
  encorafenib and pitolisant both increase QTc interval. Avoid or Use Alternate Drug.
• ponesimod
  encorafenib and ponesimod both increase QTc interval. Avoid or Use Alternate Drug.
• posaconazole
  posaconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and posaconazole both increase QTc interval. Avoid or Use Alternate Drug.
• praziquantel
  encorafenib will decrease the level or effect of praziquantel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• pretomanid
  encorafenib will decrease the level or effect of pretomanid by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Pretomanid is a CYP3A4 substrate. Avoid coadministration of strong or moderate CYP3A4 inducers.
• primaquine
  encorafenib and primaquine both increase QTc interval. Avoid or Use Alternate Drug.
• primidone
  primidone will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• procainamide
  encorafenib and procainamide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• promazine
  encorafenib and promazine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• promethazine
  encorafenib and promethazine both decrease QTc interval. Avoid or Use Alternate Drug.
• propafenone
  encorafenib and propafenone both increase QTc interval. Avoid or Use Alternate Drug.
• protriptyline
  encorafenib and protriptyline both increase QTc interval. Avoid or Use Alternate Drug.
• quetiapine
  encorafenib and quetiapine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• quinidine
  encorafenib and quinidine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• quinine
  encorafenib and quinine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• quinupristin/dalfopristin
  quinupristin/dalfopristin will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• quizartinib
  encorafenib will decrease the level or effect of quizartinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• ranolazine
  encorafenib and ranolazine both increase QTc interval. Avoid or Use Alternate Drug.
• repotrectinib
  encorafenib will decrease the level or effect of repotrectinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• ribociclib
  ribociclib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.encorafenib and ribociclib both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.ribociclib increases toxicity of encorafenib by QTc interval. Avoid or Use Alternate Drug.
• rifabutin
  rifabutin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• rifampin
  rifampin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• rifapentine
  rifapentine will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• rilpivirine
  encorafenib and rilpivirine both increase QTc interval. Avoid or Use Alternate Drug.
• rimegepant
  encorafenib, rimegepant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of rimegepant (a CYP3A4 substrate) with drugs that both inhibit and induce CYP3A4 (eg, encorafenib).
• risperidone
  encorafenib and risperidone both increase QTc interval. Avoid or Use Alternate Drug.
• ritonavir
  ritonavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• romidepsin
  encorafenib and romidepsin both increase QTc interval. Avoid or Use Alternate Drug.
• schisandra
  schisandra will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• selumetinib
  encorafenib will decrease the level or effect of selumetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• sertraline
  encorafenib and sertraline both increase QTc interval. Avoid or Use Alternate Drug.
• sevoflurane
  encorafenib and sevoflurane both increase QTc interval. Avoid or Use Alternate Drug.
• siponimod
  encorafenib will decrease the level or effect of siponimod by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of siponimod with a drug that causes moderate CYP2C9 plus a moderate or strong CYP3A4 inducer is not recommended. Coadministration with moderate or strong CYP3A4 inducers alone is not recommended for patients with CYP2C9*1/*3 and*2/*3 genotype.encorafenib and siponimod both increase QTc interval. Avoid or Use Alternate Drug.
• solifenacin
  encorafenib and solifenacin both increase QTc interval. Avoid or Use Alternate Drug.
• sorafenib
  encorafenib and sorafenib both increase QTc interval. Avoid or Use Alternate Drug.
• sotalol
  encorafenib and sotalol both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• sulbactam/durlobactam
  encorafenib will increase the level or effect of sulbactam/durlobactam by Other (see comment). Avoid or Use Alternate Drug. Sulbactam is predicted to have active secretion by OATP1 as a significant portion of total clearance; therefore, inhibition of OAT1 may increase sulbactam plasma concentrations
• sunitinib
  encorafenib and sunitinib both increase QTc interval. Avoid or Use Alternate Drug.
• tacrolimus
  encorafenib and tacrolimus both increase QTc interval. Avoid or Use Alternate Drug.
• tazemetostat
  encorafenib, tazemetostat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of tazemetostat with moderate and strong CYP3A4 inhibitors or inducers.
• telavancin
  encorafenib and telavancin both increase QTc interval. Avoid or Use Alternate Drug.
• tetrabenazine
  encorafenib and tetrabenazine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• thioridazine
  encorafenib and thioridazine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• tipranavir
  tipranavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• toremifene
  encorafenib and toremifene both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• trazodone
  encorafenib and trazodone both increase QTc interval. Avoid or Use Alternate Drug.
• trimipramine
  encorafenib and trimipramine both increase QTc interval. Avoid or Use Alternate Drug.
• triptorelin
  encorafenib and triptorelin both increase QTc interval. Avoid or Use Alternate Drug.
• tucatinib
  tucatinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of tucatinib with CYP3A substrates, where minimal concentration changes may lead to serious or life-threatening toxicities. If unavoidable, reduce CYP3A substrate dose according to product labeling.
• vandetanib
  encorafenib and vandetanib both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• vardenafil
  encorafenib and vardenafil both increase QTc interval. Avoid or Use Alternate Drug.
• vemurafenib
  encorafenib and vemurafenib both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• venlafaxine
  encorafenib and venlafaxine both decrease QTc interval. Avoid or Use Alternate Drug.
• verapamil
  verapamil will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• voclosporin
  encorafenib will decrease the level or effect of voclosporin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• vonoprazan
  encorafenib will decrease the level or effect of vonoprazan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
• voriconazole
  voriconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
• vorinostat
  encorafenib and vorinostat both increase QTc interval. Avoid or Use Alternate Drug.
• zanubrutinib
  encorafenib, zanubrutinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib may inhibit or induce CYP3A4. .
• zavegepant intranasal
  encorafenib will increase the level or effect of zavegepant intranasal by Other (see comment). Avoid or Use Alternate Drug. OATP1B3 inhibitors may result in a significant increase in systemic exposure of zavegepant (an OATP1B3 substrate).
• ziprasidone
  encorafenib and ziprasidone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
• zuranolone
  encorafenib, zuranolone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use with drugs that inhibit and induce CYP3A4.

Monitor Closely (347)

• abemaciclib
  encorafenib, abemaciclib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• abiraterone
  encorafenib, abiraterone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• acalabrutinib
  encorafenib, acalabrutinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ado-trastuzumab emtansine
  encorafenib, ado-trastuzumab emtansine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• albuterol
  albuterol and encorafenib both increase QTc interval. Use Caution/Monitor.
• alfentanil
  encorafenib, alfentanil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• alfuzosin
  encorafenib, alfuzosin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib and alfuzosin both increase QTc interval. Use Caution/Monitor.
• alpelisib
  encorafenib will decrease the level or effect of alpelisib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.encorafenib will increase the level or effect of alpelisib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• alprazolam
  encorafenib, alprazolam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ambrisentan
  encorafenib will increase the level or effect of ambrisentan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• amiodarone
  encorafenib, amiodarone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• amlodipine
  encorafenib, amlodipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• apalutamide
  encorafenib, apalutamide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• apixaban
  encorafenib, apixaban. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• apremilast
  encorafenib, apremilast. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• aprepitant
  encorafenib, aprepitant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• arformoterol
  arformoterol and encorafenib both increase QTc interval. Use Caution/Monitor.
• aripiprazole
  encorafenib, aripiprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• armodafinil
  encorafenib, armodafinil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• atazanavir
  encorafenib, atazanavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• atogepant
  encorafenib, atogepant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor if atogepant (a CYP3A4 substrate) is coadministered with encorafenib (a CYP3A4 inhibitor and inducer).encorafenib will increase the level or effect of atogepant by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• atorvastatin
  encorafenib, atorvastatin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of atorvastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• avanafil
  encorafenib, avanafil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• axitinib
  encorafenib, axitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• azithromycin
  azithromycin increases toxicity of encorafenib by QTc interval. Use Caution/Monitor.
• bedaquiline
  encorafenib, bedaquiline. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• belumosudil
  encorafenib will decrease the level or effect of belumosudil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
• belzutifan
  belzutifan will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If unable to avoid coadministration of belzutifan with sensitive CYP3A4 substrates, consider increasing the sensitive CYP3A4 substrate dose in accordance with its prescribing information.
• benzhydrocodone/acetaminophen
  encorafenib, benzhydrocodone/acetaminophen. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• benzphetamine
  encorafenib, benzphetamine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• bortezomib
  encorafenib, bortezomib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• bosentan
  encorafenib, bosentan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of bosentan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• bosutinib
  encorafenib, bosutinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• brentuximab vedotin
  encorafenib, brentuximab vedotin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• brexpiprazole
  encorafenib, brexpiprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• brigatinib
  encorafenib, brigatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• bromocriptine
  encorafenib, bromocriptine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• budesonide
  encorafenib, budesonide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• buprenorphine
  encorafenib, buprenorphine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• buprenorphine subdermal implant
  encorafenib, buprenorphine subdermal implant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• buprenorphine transdermal
  encorafenib, buprenorphine transdermal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• buspirone
  encorafenib, buspirone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• cabozantinib
  encorafenib, cabozantinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• calcifediol
  encorafenib, calcifediol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• calcitriol
  encorafenib, calcitriol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• carbamazepine
  encorafenib, carbamazepine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• cariprazine
  encorafenib, cariprazine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• caspofungin
  encorafenib will increase the level or effect of caspofungin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• cenobamate
  cenobamate will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Increase dose of CYP3A4 substrate, as needed, when coadministered with cenobamate.
• ceritinib
  encorafenib, ceritinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• chlordiazepoxide
  encorafenib, chlordiazepoxide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• chloroquine
  encorafenib, chloroquine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.chloroquine increases toxicity of encorafenib by QTc interval. Use Caution/Monitor.
• chlorothiazide
  encorafenib will increase the level or effect of chlorothiazide by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• cilostazol
  encorafenib, cilostazol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• cimetidine
  encorafenib will increase the level or effect of cimetidine by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• citalopram
  encorafenib, citalopram. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• clarithromycin
  encorafenib, clarithromycin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• clonazepam
  encorafenib, clonazepam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• clorazepate
  encorafenib, clorazepate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• cobicistat
  encorafenib, cobicistat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• cobimetinib
  encorafenib, cobimetinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• colchicine
  encorafenib, colchicine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• conivaptan
  encorafenib, conivaptan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• conjugated estrogens
  encorafenib, conjugated estrogens. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• copanlisib
  encorafenib, copanlisib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• crizotinib
  encorafenib, crizotinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• cyclosporine
  encorafenib, cyclosporine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• cyproheptadine
  encorafenib, cyproheptadine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dabrafenib
  encorafenib, dabrafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dantrolene
  encorafenib, dantrolene. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dapsone
  encorafenib, dapsone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• darifenacin
  encorafenib, darifenacin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• darunavir
  encorafenib, darunavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dasatinib
  encorafenib, dasatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• daunorubicin
  encorafenib will increase the level or effect of daunorubicin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• deflazacort
  encorafenib, deflazacort. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dengue vaccine
  encorafenib decreases effects of dengue vaccine by immunosuppressive effects; risk of infection. Use Caution/Monitor. Immunosuppressive therapies (eg, irradiation, antimetabolites, alkylating agents, cytotoxic drugs, corticosteroids [greater than physiologic doses]) may reduce immune response to dengue vaccine.
• deutetrabenazine
  encorafenib and deutetrabenazine both increase QTc interval. Use Caution/Monitor. At the maximum recommended dose, deutetrabenazine does not prolong QT interval to a clinically relevant extent. Certain circumstances may increase risk of torsade de pointes and/or sudden death in association with drugs that prolong the QTc interval (eg, bradycardia, hypokalemia or hypomagnesemia, coadministration with other drugs that prolong QTc interval, presence of congenital QT prolongation).
• dexamethasone
  encorafenib, dexamethasone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• diazepam
  encorafenib, diazepam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• diazepam buccal
  encorafenib, diazepam buccal. Other (see comment). Use Caution/Monitor. Comment: Coadministration may either increase or decrease diazepam elimination.
• diazepam intranasal
  encorafenib, diazepam intranasal. Other (see comment). Use Caution/Monitor. Comment: Coadministration may either increase or decrease diazepam elimination.
• digoxin
  encorafenib will increase the level or effect of digoxin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• dihydroergotamine
  encorafenib, dihydroergotamine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dihydroergotamine inhaled
  encorafenib, dihydroergotamine inhaled. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dihydroergotamine intranasal
  encorafenib, dihydroergotamine intranasal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• diltiazem
  encorafenib, diltiazem. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dipyridamole
  encorafenib will increase the level or effect of dipyridamole by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• disopyramide
  encorafenib, disopyramide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• docetaxel
  encorafenib, docetaxel. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• doxorubicin
  encorafenib, doxorubicin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• doxorubicin liposomal
  encorafenib, doxorubicin liposomal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• dronedarone
  encorafenib, dronedarone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• duvelisib
  duvelisib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration with duvelisib increases AUC of a sensitive CYP3A4 substrate which may increase the risk of toxicities of these drugs. Consider reducing the dose of the sensitive CYP3A4 substrate and monitor for signs of toxicities of the coadministered sensitive CYP3A substrate.
• efavirenz
  encorafenib, efavirenz. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• elagolix
  elagolix will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Elagolix is a weak-to-moderate CYP3A4 inducer. Monitor CYP3A substrates if coadministered. Consider increasing CYP3A substrate dose if needed.
• elbasvir/grazoprevir
  encorafenib, elbasvir/grazoprevir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of elbasvir/grazoprevir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• eletriptan
  encorafenib, eletriptan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• eliglustat
  encorafenib, eliglustat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• eluxadoline
  encorafenib will increase the level or effect of eluxadoline by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• elvitegravir
  encorafenib, elvitegravir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• enalapril
  encorafenib will increase the level or effect of enalapril by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• enzalutamide
  encorafenib, enzalutamide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• eplerenone
  encorafenib, eplerenone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ergoloid mesylates
  encorafenib, ergoloid mesylates. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• erlotinib
  encorafenib, erlotinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• erythromycin base
  encorafenib, erythromycin base. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of erythromycin base by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• erythromycin ethylsuccinate
  encorafenib, erythromycin ethylsuccinate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of erythromycin ethylsuccinate by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• erythromycin lactobionate
  encorafenib, erythromycin lactobionate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of erythromycin lactobionate by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• erythromycin stearate
  encorafenib, erythromycin stearate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of erythromycin stearate by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• escitalopram
  encorafenib, escitalopram. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• estradiol
  encorafenib, estradiol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• estrogens conjugated synthetic
  encorafenib, estrogens conjugated synthetic. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• estrogens esterified
  encorafenib, estrogens esterified. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• estropipate
  encorafenib, estropipate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• eszopiclone
  encorafenib, eszopiclone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ethinylestradiol
  encorafenib will increase the level or effect of ethinylestradiol by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• ethosuximide
  encorafenib, ethosuximide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• etoposide
  encorafenib, etoposide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• etravirine
  encorafenib, etravirine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• everolimus
  encorafenib, everolimus. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• exemestane
  encorafenib, exemestane. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ezetimibe
  encorafenib will increase the level or effect of ezetimibe by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• fedratinib
  fedratinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Adjust dose of drugs that are CYP3A4 substrates as necessary.
• felbamate
  encorafenib, felbamate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• felodipine
  encorafenib, felodipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fentanyl
  encorafenib, fentanyl. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fentanyl intranasal
  encorafenib, fentanyl intranasal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fentanyl transdermal
  encorafenib, fentanyl transdermal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fentanyl transmucosal
  encorafenib, fentanyl transmucosal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fexofenadine
  encorafenib will increase the level or effect of fexofenadine by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• fluphenazine
  encorafenib and fluphenazine both increase QTc interval. Use Caution/Monitor.
• flurazepam
  encorafenib, flurazepam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fluvastatin
  encorafenib will increase the level or effect of fluvastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• formoterol
  encorafenib and formoterol both increase QTc interval. Use Caution/Monitor.
• fosamprenavir
  encorafenib, fosamprenavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fosaprepitant
  encorafenib, fosaprepitant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fostamatinib
  encorafenib, fostamatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• fostemsavir
  encorafenib and fostemsavir both increase QTc interval. Use Caution/Monitor. QTc prolongation reported with higher than recommended doses of fostemsavir.
• gadobenate
  encorafenib and gadobenate both increase QTc interval. Use Caution/Monitor.
• gefitinib
  encorafenib, gefitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• gepirone
  encorafenib will increase the level or effect of gepirone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce gepirone dose by 50% when used concomitantly with a moderate CYP3A4 inhibitor.gepirone and encorafenib both increase QTc interval. Modify Therapy/Monitor Closely.
• glecaprevir/pibrentasvir
  encorafenib, glecaprevir/pibrentasvir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of glecaprevir/pibrentasvir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• glyburide
  encorafenib will increase the level or effect of glyburide by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• guanfacine
  encorafenib, guanfacine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• haloperidol
  encorafenib, haloperidol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• hydrocodone
  encorafenib, hydrocodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• hydroxyprogesterone caproate (DSC)
  encorafenib, hydroxyprogesterone caproate (DSC). affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ibrutinib
  encorafenib, ibrutinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• idelalisib
  encorafenib, idelalisib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• imatinib
  encorafenib, imatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of imatinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP and OATP1B3 inhibitor) may increase the concentration and toxicities of BCRP and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• indacaterol, inhaled
  encorafenib and indacaterol, inhaled both increase QTc interval. Use Caution/Monitor.
• irinotecan
  encorafenib, irinotecan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of irinotecan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• irinotecan liposomal
  encorafenib, irinotecan liposomal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• isosorbide dinitrate
  encorafenib, isosorbide dinitrate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• isosorbide mononitrate
  encorafenib, isosorbide mononitrate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• isradipine
  encorafenib, isradipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• istradefylline
  istradefylline will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of CYP3A4 substrates in clinical trials. This effect was not observed with istradefylline 20 mg/day. Consider dose reduction of sensitive CYP3A4 substrates.
• ivacaftor
  encorafenib will increase the level or effect of ivacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce ivacaftor dose if coadministered with moderate CYP3A4 inhibitors. See specific ivacaftor-containing product for precise dosage modification.
• ixabepilone
  encorafenib, ixabepilone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ixazomib
  encorafenib, ixazomib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ketamine
  encorafenib, ketamine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ketoconazole
  encorafenib, ketoconazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• lansoprazole
  encorafenib, lansoprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• lapatinib
  encorafenib, lapatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of lapatinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• ledipasvir/sofosbuvir
  encorafenib will increase the level or effect of ledipasvir/sofosbuvir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• leflunomide
  encorafenib will increase the level or effect of leflunomide by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• lenvatinib
  encorafenib will increase the level or effect of lenvatinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• letermovir
  encorafenib will increase the level or effect of letermovir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• levalbuterol
  encorafenib and levalbuterol both increase QTc interval. Use Caution/Monitor.
• levamlodipine
  encorafenib will decrease the level or effect of levamlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. No information is available on the quantitative effects of CYP3A4 inducers on amlodipine. Closely monitor blood pressure when amlodipine is coadministered with CYP3A4 inducers.
• levoketoconazole
  encorafenib, levoketoconazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• levomilnacipran
  encorafenib, levomilnacipran. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• levonorgestrel oral
  encorafenib, levonorgestrel oral. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• lidocaine
  encorafenib, lidocaine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• linagliptin
  encorafenib, linagliptin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• lomitapide
  encorafenib, lomitapide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• lopinavir
  encorafenib, lopinavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• losartan
  encorafenib, losartan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• lovastatin
  encorafenib, lovastatin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of lovastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• lumefantrine
  encorafenib, lumefantrine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• lurasidone
  encorafenib, lurasidone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• macimorelin
  encorafenib, macimorelin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• macitentan
  encorafenib, macitentan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• maraviroc
  encorafenib, maraviroc. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• marijuana
  encorafenib, marijuana. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• mavorixafor
  encorafenib, mavorixafor. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Encorafenib inhibits and induces CYP3A4. .mavorixafor and encorafenib both increase QTc interval. Modify Therapy/Monitor Closely. Mavorixafor causes concentration-dependent QTc prolongation. Monitor QTc during treatment in patients with risk factors for QTc prolongation (eg, coadministered medications that increase mavorixafor exposure or other drugs with a high risk to prolong the QTc interval). Mavorixafor dose reduction or discontinuation may be required.
• medroxyprogesterone
  encorafenib, medroxyprogesterone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• mefloquine
  encorafenib, mefloquine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• mestranol
  encorafenib, mestranol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• metaxalone
  encorafenib, metaxalone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• methadone
  encorafenib, methadone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• methotrexate
  encorafenib will increase the level or effect of methotrexate by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• methylergonovine
  encorafenib, methylergonovine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• methylprednisolone
  encorafenib, methylprednisolone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• midazolam
  encorafenib, midazolam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• midostaurin
  encorafenib, midostaurin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• mifepristone
  encorafenib, mifepristone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• mirtazapine
  encorafenib, mirtazapine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• mitoxantrone
  encorafenib will increase the level or effect of mitoxantrone by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• modafinil
  encorafenib, modafinil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• momelotinib
  encorafenib increases toxicity of momelotinib by Other (see comment). Use Caution/Monitor. Comment: OATP1B1/B3 inhibitor increases momelotinib (OATP1B1/B3 subtrate) plasma concentrations, which may increase the risk of adverse reactions with momelotinib.
• naldemedine
  encorafenib, naldemedine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• naloxegol
  encorafenib, naloxegol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• nefazodone
  encorafenib, nefazodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• nelfinavir
  encorafenib, nelfinavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• netupitant/palonosetron
  encorafenib, netupitant/palonosetron. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• nevirapine
  encorafenib, nevirapine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• nicardipine
  encorafenib, nicardipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• nifedipine
  encorafenib, nifedipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• nilotinib
  encorafenib, nilotinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• nimodipine
  encorafenib, nimodipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• nisoldipine
  encorafenib, nisoldipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• norethindrone
  encorafenib, norethindrone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• norgestrel
  encorafenib will decrease the level or effect of norgestrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Moderate CYP3A4 inducers may decrease progestin concentration; consider use of additional barrier methods
• olaparib
  encorafenib, olaparib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• oliceridine
  encorafenib will increase the level or effect of oliceridine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If concomitant use is necessary, may require less frequent oliceridine dosing. Closely monitor for respiratory depression and sedation and titrate subsequent doses accordingly. If inhibitor is discontinued, consider increase oliceridine dosage until stable drug effects are achieved. Monitor for signs of opioid withdrawal.
• olmesartan
  encorafenib will increase the level or effect of olmesartan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• olodaterol inhaled
  encorafenib and olodaterol inhaled both increase QTc interval. Use Caution/Monitor.
• omeprazole
  encorafenib, omeprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ondansetron
  encorafenib, ondansetron. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• osilodrostat
  osilodrostat and encorafenib both increase QTc interval. Use Caution/Monitor.
• osimertinib
  encorafenib, osimertinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of osimertinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• ospemifene
  encorafenib, ospemifene. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• oxycodone
  encorafenib, oxycodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ozanimod
  ozanimod and encorafenib both increase QTc interval. Modify Therapy/Monitor Closely. The potential additive effects on heart rate, treatment with ozanimod should generally not be initiated in patients who are concurrently treated with QT prolonging drugs with known arrhythmogenic properties.encorafenib will increase the level or effect of ozanimod by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• paclitaxel
  encorafenib, paclitaxel. affecting hepatic enzyme CYP2E1 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of paclitaxel by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• paclitaxel protein bound
  encorafenib, paclitaxel protein bound. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• palbociclib
  encorafenib, palbociclib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• palovarotene
  encorafenib will increase the level or effect of palovarotene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Avoid coadministration of palovarotene, a CYP3A substrate, with moderate CYP3A inhibitors. If unavoidable, reduce palovarotene dose by 50%.
• panobinostat
  encorafenib, panobinostat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• pantoprazole
  encorafenib will increase the level or effect of pantoprazole by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• pazopanib
  encorafenib, pazopanib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of pazopanib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• perampanel
  encorafenib, perampanel. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• perphenazine
  encorafenib and perphenazine both increase QTc interval. Use Caution/Monitor.
• pimavanserin
  encorafenib, pimavanserin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• pitavastatin
  encorafenib will increase the level or effect of pitavastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• ponatinib
  encorafenib, ponatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• pravastatin
  encorafenib will increase the level or effect of pravastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• primaquine
  encorafenib, primaquine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• prochlorperazine
  encorafenib and prochlorperazine both decrease QTc interval. Use Caution/Monitor.
• progesterone intravaginal gel
  encorafenib, progesterone intravaginal gel. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• progesterone micronized
  encorafenib, progesterone micronized. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• quetiapine
  encorafenib, quetiapine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• quinidine
  encorafenib, quinidine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• quinine
  encorafenib, quinine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• quizartinib
  quizartinib, encorafenib. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Monitor patients more frequently with ECG if coadministered with QT prolonging drugs.
• rabeprazole
  encorafenib, rabeprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ranolazine
  encorafenib, ranolazine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• regorafenib
  encorafenib, regorafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• repaglinide
  encorafenib, repaglinide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of repaglinide by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• revefenacin
  encorafenib will increase the level or effect of revefenacin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• ribociclib
  encorafenib, ribociclib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• rifabutin
  encorafenib, rifabutin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• rifampin
  encorafenib will increase the level or effect of rifampin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• riociguat
  encorafenib, riociguat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of riociguat by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• ripretinib
  encorafenib will decrease the level or effect of ripretinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If coadministration cannot be avoided, increase dosing frequency from recommended dose of 150 mg once daily to 150 mg twice daily during co-administration period; monitor for clinical response and tolerability
• ritonavir
  encorafenib, ritonavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• rivaroxaban
  encorafenib, rivaroxaban. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• roflumilast
  encorafenib, roflumilast. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• rolapitant
  encorafenib, rolapitant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• romidepsin
  encorafenib, romidepsin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ropivacaine
  encorafenib, ropivacaine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• rosuvastatin
  encorafenib will increase the level or effect of rosuvastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• rucaparib
  rucaparib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Adjust dosage of CYP3A4 substrates, if clinically indicated.
• ruxolitinib
  encorafenib, ruxolitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ruxolitinib topical
  encorafenib, ruxolitinib topical. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• salmeterol
  encorafenib, salmeterol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib and salmeterol both increase QTc interval. Use Caution/Monitor.
• saxagliptin
  encorafenib, saxagliptin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• seladelpar
  encorafenib increases levels of seladelpar by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Caution in patients who are poor CYP2C9 metabolizers taking seladelpar and are coadministered a moderate/strong CYP3A4 inhibitor.encorafenib increases levels of seladelpar by Other (see comment). Use Caution/Monitor. Comment: Monitor seladelpar for adverse effects if coadministered with BCRP inhibitors.
• selexipag
  encorafenib will increase the level or effect of selexipag by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• selpercatinib
  selpercatinib increases toxicity of encorafenib by QTc interval. Use Caution/Monitor.
• selumetinib
  encorafenib will increase the level or effect of selumetinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• sildenafil
  encorafenib, sildenafil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• simvastatin
  encorafenib, simvastatin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of simvastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• siponimod
  siponimod and encorafenib both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Caution if coadministered because of additive immunosuppressive effects during such therapy and in the weeks following administration. When switching from drugs with prolonged immune effects, consider the half-life and mode of action of these drugs to avoid unintended additive immunosuppressive effects.
• sirolimus
  encorafenib, sirolimus. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• sofosbuvir
  encorafenib will increase the level or effect of sofosbuvir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• solifenacin
  encorafenib, solifenacin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• sonidegib
  encorafenib, sonidegib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• sorafenib
  encorafenib, sorafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• sparsentan
  encorafenib will increase the level or effect of sparsentan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. No dosage adjustment needed. Monitor blood pressure, serum potassium, edema, and kidney function regularly if sparsentan is coadministered with moderate CYP3A4 inhibitors.
• stiripentol
  stiripentol, encorafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Stiripentol is a CYP3A4 inhibitor and inducer. Monitor CYP3A4 substrates coadministered with stiripentol for increased or decreased effects. CYP3A4 substrates may require dosage adjustment.encorafenib will decrease the level or effect of stiripentol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor closely if stiripentol is coadministered with a moderate CYP3A4 inducer.
• sufentanil
  encorafenib, sufentanil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• sufentanil SL
  encorafenib, sufentanil SL. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of sufentanil SL with encorafenib, a CYP3A4 inhibitor and inducer, may increase sufentanil plasma concentration, and, thereby increase or prolonged adverse effects, including potentially fatal respiratory depression. Encorafenib may also induce sufentanil, and thereby reduce levels and efficacy.
• sulfasalazine
  encorafenib will increase the level or effect of sulfasalazine by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• sunitinib
  encorafenib, sunitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• suvorexant
  encorafenib, suvorexant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tacrolimus
  encorafenib, tacrolimus. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tacrolimus ointment
  encorafenib, tacrolimus ointment. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tadalafil
  encorafenib, tadalafil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• talazoparib
  encorafenib will increase the level or effect of talazoparib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• tamoxifen
  encorafenib, tamoxifen. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tamsulosin
  encorafenib, tamsulosin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tasimelteon
  encorafenib, tasimelteon. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tazemetostat
  tazemetostat will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
• telmisartan
  encorafenib will increase the level or effect of telmisartan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• temsirolimus
  encorafenib, temsirolimus. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• teniposide
  encorafenib, teniposide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tenofovir AF
  encorafenib will increase the level or effect of tenofovir AF by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• tenofovir DF
  encorafenib will increase the level or effect of tenofovir DF by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• tetracycline
  encorafenib, tetracycline. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tezacaftor
  encorafenib, tezacaftor. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• theophylline
  encorafenib, theophylline. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tiagabine
  encorafenib, tiagabine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• ticlopidine
  encorafenib, ticlopidine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tinidazole
  encorafenib, tinidazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tipranavir
  encorafenib, tipranavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tivozanib
  encorafenib will decrease the level or effect of tivozanib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
• tofacitinib
  encorafenib, tofacitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tolterodine
  encorafenib, tolterodine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tolvaptan
  encorafenib, tolvaptan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• topotecan
  encorafenib will increase the level or effect of topotecan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• toremifene
  encorafenib, toremifene. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• trabectedin
  encorafenib, trabectedin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• tramadol
  encorafenib, tramadol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• trazodone
  encorafenib, trazodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• triazolam
  encorafenib, triazolam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• triclabendazole
  triclabendazole and encorafenib both increase QTc interval. Use Caution/Monitor.
• trifluoperazine
  encorafenib and trifluoperazine both decrease QTc interval. Use Caution/Monitor.
• trimethoprim
  encorafenib, trimethoprim. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• trimipramine
  encorafenib, trimipramine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• troglitazone
  encorafenib will increase the level or effect of troglitazone by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• ubrogepant
  encorafenib will decrease the level or effect of ubrogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Dose adjustment is recommended with concomitant use of ubrogepant and moderate and weak CYP3A4 inducers. (see Dosage Modifications)encorafenib will increase the level or effect of ubrogepant by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• ulipristal
  encorafenib, ulipristal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• umeclidinium bromide/vilanterol inhaled
  encorafenib and umeclidinium bromide/vilanterol inhaled both decrease QTc interval. Use Caution/Monitor.
• valbenazine
  encorafenib, valbenazine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.valbenazine and encorafenib both increase QTc interval. Use Caution/Monitor.
• valsartan
  encorafenib will increase the level or effect of valsartan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• vandetanib
  encorafenib, vandetanib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• vardenafil
  encorafenib, vardenafil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• velpatasvir
  encorafenib, velpatasvir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of velpatasvir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• vemurafenib
  encorafenib, vemurafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of vemurafenib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.
• venetoclax
  encorafenib, venetoclax. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• venlafaxine
  encorafenib, venlafaxine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• verapamil
  encorafenib, verapamil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• vilanterol/fluticasone furoate inhaled
  encorafenib and vilanterol/fluticasone furoate inhaled both increase QTc interval. Use Caution/Monitor.
• vilazodone
  encorafenib, vilazodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• vinblastine
  encorafenib, vinblastine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• vincristine
  encorafenib, vincristine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• vincristine liposomal
  encorafenib, vincristine liposomal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• vinorelbine
  encorafenib, vinorelbine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• voclosporin
  voclosporin, encorafenib. Either increases effects of the other by QTc interval. Use Caution/Monitor.
• vortioxetine
  encorafenib, vortioxetine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• voxilaprevir
  encorafenib, voxilaprevir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.encorafenib will increase the level or effect of voxilaprevir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.
• warfarin
  encorafenib, warfarin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Warfarin serum concentrations may be increased or decreased. Encorafenib it both an inhibitor and inducer of CYP3A4. The less potent R-enantiomer of warfarin is a substrate of CYP3A4.
• zolpidem
  encorafenib, zolpidem. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
• zonisamide
  encorafenib, zonisamide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

Minor (7)

• acetazolamide
  acetazolamide will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• anastrozole
  anastrozole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• cyclophosphamide
  cyclophosphamide will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• drospirenone
  drospirenone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• erdafitinib
  encorafenib will decrease the level or effect of erdafitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. If a moderate CYP3A4 inducer must be coadministered, administer 8-mg/day dose initially, with potential to increase to 9 mg/day based on serum phosphate levels on Days 14-21 and tolerability. If a moderate CYP3A4 inducer must be coadministered after the initial dose increase period based on serum phosphate levels and tolerability, increase erdafitinib dose up to 9 mg. When a moderate inducer discontinued, continue erdafitinib at same dose, in absence of drug-related toxicity.

• larotrectinib
  larotrectinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• nitrofurantoin
  encorafenib will increase the level or effect of nitrofurantoin by Other (see comment). Minor/Significance Unknown. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• abemaciclib
  Monitor Closely (1)encorafenib, abemaciclib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• abiraterone
  Monitor Closely (1)encorafenib, abiraterone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• acalabrutinib
  Monitor Closely (1)encorafenib, acalabrutinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• acetazolamide
  Minor (1)acetazolamide will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• adagrasib
  Serious - Use Alternative (1)adagrasib, encorafenib. Either increases effects of the other by QTc interval. Avoid or Use Alternate Drug. Each drug prolongs the QTc interval, which may increased the risk of Torsade de pointes, other serious arryhthmias, and sudden death. If coadministration unavoidable, more frequent monitoring is recommended for such patients.

• ado-trastuzumab emtansine
  Monitor Closely (1)encorafenib, ado-trastuzumab emtansine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• albuterol
  Monitor Closely (1)albuterol and encorafenib both increase QTc interval. Use Caution/Monitor.

• alfentanil
  Monitor Closely (1)encorafenib, alfentanil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• alfuzosin
  Monitor Closely (2)encorafenib, alfuzosin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib and alfuzosin both increase QTc interval. Use Caution/Monitor.Serious - Use Alternative (1)alfuzosin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• alpelisib
  Monitor Closely (2)encorafenib will decrease the level or effect of alpelisib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  encorafenib will increase the level or effect of alpelisib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• alprazolam
  Monitor Closely (1)encorafenib, alprazolam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ambrisentan
  Monitor Closely (1)encorafenib will increase the level or effect of ambrisentan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• amiodarone
  Monitor Closely (1)encorafenib, amiodarone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and amiodarone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• amisulpride
  Serious - Use Alternative (1)encorafenib and amisulpride both increase QTc interval. Avoid or Use Alternate Drug. ECG monitoring is recommended if coadministered.

• amitriptyline
  Serious - Use Alternative (1)encorafenib and amitriptyline both increase QTc interval. Avoid or Use Alternate Drug.

• amlodipine
  Monitor Closely (1)encorafenib, amlodipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• anagrelide
  Serious - Use Alternative (1)encorafenib and anagrelide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• anastrozole
  Minor (1)anastrozole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• apalutamide
  Monitor Closely (1)encorafenib, apalutamide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)apalutamide will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• apixaban
  Monitor Closely (1)encorafenib, apixaban. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• apomorphine
  Serious - Use Alternative (1)apomorphine and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• apremilast
  Monitor Closely (1)encorafenib, apremilast. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• aprepitant
  Monitor Closely (1)encorafenib, aprepitant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)aprepitant will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• arformoterol
  Monitor Closely (1)arformoterol and encorafenib both increase QTc interval. Use Caution/Monitor.

• aripiprazole
  Monitor Closely (1)encorafenib, aripiprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)aripiprazole and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• armodafinil
  Monitor Closely (1)encorafenib, armodafinil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• arsenic trioxide
  Serious - Use Alternative (1)encorafenib and arsenic trioxide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• artemether
  Serious - Use Alternative (1)encorafenib and artemether both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• asenapine
  Serious - Use Alternative (1)encorafenib and asenapine both increase QTc interval. Avoid or Use Alternate Drug.

• asenapine transdermal
  Serious - Use Alternative (1)asenapine transdermal and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• atazanavir
  Monitor Closely (1)encorafenib, atazanavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)atazanavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• atogepant
  Monitor Closely (2)encorafenib, atogepant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor if atogepant (a CYP3A4 substrate) is coadministered with encorafenib (a CYP3A4 inhibitor and inducer).
  encorafenib will increase the level or effect of atogepant by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• atomoxetine
  Serious - Use Alternative (1)atomoxetine and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• atorvastatin
  Monitor Closely (2)encorafenib, atorvastatin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of atorvastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• avanafil
  Monitor Closely (1)encorafenib, avanafil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• avapritinib
  Serious - Use Alternative (1)encorafenib, avapritinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of avapritinib with moderate or strong CYP3A4 inhibitors. If coadministration of avapritinib with a moderate inhibitor cannot be avoided, reduce avapritinib starting dose (see drug monograph Dosage Modifications).

• axitinib
  Monitor Closely (1)encorafenib, axitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• azithromycin
  Monitor Closely (1)azithromycin increases toxicity of encorafenib by QTc interval. Use Caution/Monitor.

• bedaquiline
  Monitor Closely (1)encorafenib, bedaquiline. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)bedaquiline and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• belumosudil
  Monitor Closely (1)encorafenib will decrease the level or effect of belumosudil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• belzutifan
  Monitor Closely (1)belzutifan will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If unable to avoid coadministration of belzutifan with sensitive CYP3A4 substrates, consider increasing the sensitive CYP3A4 substrate dose in accordance with its prescribing information.

• benzhydrocodone/acetaminophen
  Monitor Closely (1)encorafenib, benzhydrocodone/acetaminophen. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• benzphetamine
  Monitor Closely (1)encorafenib, benzphetamine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• bortezomib
  Monitor Closely (1)encorafenib, bortezomib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• bosentan
  Monitor Closely (2)encorafenib, bosentan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of bosentan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)bosentan will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• bosutinib
  Monitor Closely (1)encorafenib, bosutinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• brentuximab vedotin
  Monitor Closely (1)encorafenib, brentuximab vedotin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• brexpiprazole
  Monitor Closely (1)encorafenib, brexpiprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• brigatinib
  Monitor Closely (1)encorafenib, brigatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• bromocriptine
  Monitor Closely (1)encorafenib, bromocriptine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• budesonide
  Monitor Closely (1)encorafenib, budesonide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• buprenorphine
  Monitor Closely (1)encorafenib, buprenorphine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and buprenorphine both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine buccal
  Serious - Use Alternative (1)buprenorphine buccal and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine subdermal implant
  Monitor Closely (1)encorafenib, buprenorphine subdermal implant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)buprenorphine subdermal implant and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine transdermal
  Monitor Closely (1)encorafenib, buprenorphine transdermal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)buprenorphine transdermal and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine, long-acting injection
  Serious - Use Alternative (1)buprenorphine, long-acting injection and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• buspirone
  Monitor Closely (1)encorafenib, buspirone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• cabozantinib
  Monitor Closely (1)encorafenib, cabozantinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• calcifediol
  Monitor Closely (1)encorafenib, calcifediol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• calcitriol
  Monitor Closely (1)encorafenib, calcitriol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• capivasertib
  Serious - Use Alternative (1)encorafenib, capivasertib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib may inhibit or induce CYP3A. .

• carbamazepine
  Monitor Closely (1)encorafenib, carbamazepine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)carbamazepine will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• cariprazine
  Monitor Closely (1)encorafenib, cariprazine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• caspofungin
  Monitor Closely (1)encorafenib will increase the level or effect of caspofungin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• cenobamate
  Monitor Closely (1)cenobamate will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Increase dose of CYP3A4 substrate, as needed, when coadministered with cenobamate.

• ceritinib
  Monitor Closely (1)encorafenib, ceritinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (2)ceritinib and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
  ceritinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• chloramphenicol
  Serious - Use Alternative (1)chloramphenicol will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• chlordiazepoxide
  Monitor Closely (1)encorafenib, chlordiazepoxide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• chloroquine
  Monitor Closely (2)encorafenib, chloroquine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  chloroquine increases toxicity of encorafenib by QTc interval. Use Caution/Monitor.

• chlorothiazide
  Monitor Closely (1)encorafenib will increase the level or effect of chlorothiazide by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• chlorpromazine
  Serious - Use Alternative (1)encorafenib and chlorpromazine both increase QTc interval. Avoid or Use Alternate Drug.

• cilostazol
  Monitor Closely (1)encorafenib, cilostazol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• cimetidine
  Monitor Closely (1)encorafenib will increase the level or effect of cimetidine by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• ciprofloxacin
  Serious - Use Alternative (1)encorafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• citalopram
  Monitor Closely (1)encorafenib, citalopram. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and citalopram both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• clarithromycin
  Monitor Closely (1)encorafenib, clarithromycin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (2)clarithromycin will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  clarithromycin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• clomipramine
  Serious - Use Alternative (1)encorafenib and clomipramine both increase QTc interval. Avoid or Use Alternate Drug.

• clonazepam
  Monitor Closely (1)encorafenib, clonazepam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• clorazepate
  Monitor Closely (1)encorafenib, clorazepate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• clozapine
  Serious - Use Alternative (1)clozapine and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• cobicistat
  Monitor Closely (1)encorafenib, cobicistat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)cobicistat will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• cobimetinib
  Monitor Closely (1)encorafenib, cobimetinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• colchicine
  Monitor Closely (1)encorafenib, colchicine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• conivaptan
  Monitor Closely (1)encorafenib, conivaptan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)conivaptan will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concurrent use with CYP3A4 substrates. Delay initiation of drugs metabolized by CYP3A4 for at least 7 days following the discontinuation of conivaptan.

• conjugated estrogens
  Monitor Closely (1)encorafenib, conjugated estrogens. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• copanlisib
  Monitor Closely (1)encorafenib, copanlisib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• crizotinib
  Monitor Closely (1)encorafenib, crizotinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (2)crizotinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  crizotinib and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• cyclophosphamide
  Minor (1)cyclophosphamide will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• cyclosporine
  Monitor Closely (1)encorafenib, cyclosporine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)cyclosporine will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• cyproheptadine
  Monitor Closely (1)encorafenib, cyproheptadine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• dabrafenib
  Monitor Closely (1)encorafenib, dabrafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)dabrafenib will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• danazol
  Serious - Use Alternative (1)danazol will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• dantrolene
  Monitor Closely (1)encorafenib, dantrolene. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• dapsone
  Monitor Closely (1)encorafenib, dapsone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• daridorexant
  Serious - Use Alternative (1)encorafenib, daridorexant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib, a CYP3A4 inducer and inhibitor, may increase or decrease daridorexant levels.

• darifenacin
  Monitor Closely (1)encorafenib, darifenacin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• darunavir
  Monitor Closely (1)encorafenib, darunavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)darunavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• dasatinib
  Monitor Closely (1)encorafenib, dasatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)dasatinib and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• daunorubicin
  Monitor Closely (1)encorafenib will increase the level or effect of daunorubicin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• deflazacort
  Monitor Closely (1)encorafenib, deflazacort. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• degarelix
  Serious - Use Alternative (1)degarelix and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• dengue vaccine
  Monitor Closely (1)encorafenib decreases effects of dengue vaccine by immunosuppressive effects; risk of infection. Use Caution/Monitor. Immunosuppressive therapies (eg, irradiation, antimetabolites, alkylating agents, cytotoxic drugs, corticosteroids [greater than physiologic doses]) may reduce immune response to dengue vaccine.

• desflurane
  Serious - Use Alternative (1)desflurane and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• desipramine
  Serious - Use Alternative (1)encorafenib and desipramine both increase QTc interval. Avoid or Use Alternate Drug.

• deuruxolitinib
  Serious - Use Alternative (1)encorafenib decreases levels of deuruxolitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of deuruxolitinib with strong CYP3A4 inducers.

• deutetrabenazine
  Monitor Closely (1)encorafenib and deutetrabenazine both increase QTc interval. Use Caution/Monitor. At the maximum recommended dose, deutetrabenazine does not prolong QT interval to a clinically relevant extent. Certain circumstances may increase risk of torsade de pointes and/or sudden death in association with drugs that prolong the QTc interval (eg, bradycardia, hypokalemia or hypomagnesemia, coadministration with other drugs that prolong QTc interval, presence of congenital QT prolongation).

• dexamethasone
  Monitor Closely (1)encorafenib, dexamethasone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• diazepam
  Monitor Closely (1)encorafenib, diazepam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• diazepam buccal
  Monitor Closely (1)encorafenib, diazepam buccal. Other (see comment). Use Caution/Monitor. Comment: Coadministration may either increase or decrease diazepam elimination.

• diazepam intranasal
  Monitor Closely (1)encorafenib, diazepam intranasal. Other (see comment). Use Caution/Monitor. Comment: Coadministration may either increase or decrease diazepam elimination.

• dienogest/estradiol valerate
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of dienogest/estradiol valerate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Encorafenib can cause fetal harm. Advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.

• digoxin
  Monitor Closely (1)encorafenib will increase the level or effect of digoxin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• dihydroergotamine
  Monitor Closely (1)encorafenib, dihydroergotamine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• dihydroergotamine inhaled
  Monitor Closely (1)encorafenib, dihydroergotamine inhaled. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• dihydroergotamine intranasal
  Monitor Closely (1)encorafenib, dihydroergotamine intranasal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• diltiazem
  Monitor Closely (1)encorafenib, diltiazem. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)diltiazem will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• dipyridamole
  Monitor Closely (1)encorafenib will increase the level or effect of dipyridamole by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• disopyramide
  Monitor Closely (1)encorafenib, disopyramide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and disopyramide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• docetaxel
  Monitor Closely (1)encorafenib, docetaxel. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• dofetilide
  Serious - Use Alternative (2)dofetilide increases toxicity of encorafenib by QTc interval. Avoid or Use Alternate Drug.
  encorafenib and dofetilide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• dolasetron
  Serious - Use Alternative (1)dolasetron and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• donepezil
  Serious - Use Alternative (1)donepezil and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• doravirine
  Contraindicated (1)encorafenib will decrease the level or effect of doravirine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of doravirine with a CYP3A inducer may decrease doravirine plasma concentrations and/or effects. Potential for loss of virologic response and possible resistance to doravirine.

• doxepin
  Serious - Use Alternative (1)doxepin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• doxorubicin
  Monitor Closely (1)encorafenib, doxorubicin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• doxorubicin liposomal
  Monitor Closely (1)encorafenib, doxorubicin liposomal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• dronedarone
  Contraindicated (1)encorafenib and dronedarone both increase QTc interval. Contraindicated.Monitor Closely (1)encorafenib, dronedarone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)dronedarone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• droperidol
  Serious - Use Alternative (1)encorafenib and droperidol both increase QTc interval. Avoid or Use Alternate Drug.

• drospirenone
  Minor (1)drospirenone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• duvelisib
  Monitor Closely (1)duvelisib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration with duvelisib increases AUC of a sensitive CYP3A4 substrate which may increase the risk of toxicities of these drugs. Consider reducing the dose of the sensitive CYP3A4 substrate and monitor for signs of toxicities of the coadministered sensitive CYP3A substrate.

• efavirenz
  Monitor Closely (1)encorafenib, efavirenz. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (3)efavirenz and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
  efavirenz will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  encorafenib and efavirenz both increase QTc interval. Avoid or Use Alternate Drug.

• elacestrant
  Serious - Use Alternative (1)encorafenib, elacestrant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib inhibits and induces CYP3A4. Avoid with sensitive CYP3A4 substrates.

• elagolix
  Contraindicated (1)encorafenib will increase the level or effect of elagolix by Other (see comment). Contraindicated.Monitor Closely (1)elagolix will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Elagolix is a weak-to-moderate CYP3A4 inducer. Monitor CYP3A substrates if coadministered. Consider increasing CYP3A substrate dose if needed.

• elbasvir/grazoprevir
  Monitor Closely (2)encorafenib, elbasvir/grazoprevir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of elbasvir/grazoprevir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• eletriptan
  Monitor Closely (1)encorafenib, eletriptan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• eliglustat
  Monitor Closely (1)encorafenib, eliglustat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and eliglustat both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• eluxadoline
  Monitor Closely (1)encorafenib will increase the level or effect of eluxadoline by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• elvitegravir
  Monitor Closely (1)encorafenib, elvitegravir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• elvitegravir/cobicistat/emtricitabine/tenofovir DF
  Serious - Use Alternative (1)elvitegravir/cobicistat/emtricitabine/tenofovir DF will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• enalapril
  Monitor Closely (1)encorafenib will increase the level or effect of enalapril by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• entrectinib
  Serious - Use Alternative (2)encorafenib and entrectinib both increase QTc interval. Avoid or Use Alternate Drug.
  encorafenib will decrease the level or effect of entrectinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• enzalutamide
  Monitor Closely (1)encorafenib, enzalutamide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)enzalutamide will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• eplerenone
  Monitor Closely (1)encorafenib, eplerenone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• erdafitinib
  Minor (1)encorafenib will decrease the level or effect of erdafitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. If a moderate CYP3A4 inducer must be coadministered, administer 8-mg/day dose initially, with potential to increase to 9 mg/day based on serum phosphate levels on Days 14-21 and tolerability. If a moderate CYP3A4 inducer must be coadministered after the initial dose increase period based on serum phosphate levels and tolerability, increase erdafitinib dose up to 9 mg. When a moderate inducer discontinued, continue erdafitinib at same dose, in absence of drug-related toxicity.

• ergoloid mesylates
  Monitor Closely (1)encorafenib, ergoloid mesylates. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• eribulin
  Serious - Use Alternative (2)eribulin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.
  encorafenib and eribulin both increase QTc interval. Avoid or Use Alternate Drug.

• erlotinib
  Monitor Closely (1)encorafenib, erlotinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• erythromycin base
  Monitor Closely (2)encorafenib, erythromycin base. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of erythromycin base by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (2)erythromycin base will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and erythromycin base both increase QTc interval. Avoid or Use Alternate Drug.

• erythromycin ethylsuccinate
  Monitor Closely (2)encorafenib, erythromycin ethylsuccinate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of erythromycin ethylsuccinate by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (2)erythromycin ethylsuccinate will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and erythromycin ethylsuccinate both increase QTc interval. Avoid or Use Alternate Drug.

• erythromycin lactobionate
  Monitor Closely (2)encorafenib, erythromycin lactobionate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of erythromycin lactobionate by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (2)erythromycin lactobionate will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and erythromycin lactobionate both increase QTc interval. Avoid or Use Alternate Drug.

• erythromycin stearate
  Monitor Closely (2)encorafenib, erythromycin stearate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of erythromycin stearate by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (2)erythromycin stearate will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and erythromycin stearate both increase QTc interval. Avoid or Use Alternate Drug.

• escitalopram
  Monitor Closely (1)encorafenib, escitalopram. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)escitalopram increases toxicity of encorafenib by QTc interval. Avoid or Use Alternate Drug.

• estradiol
  Monitor Closely (1)encorafenib, estradiol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• estrogens conjugated synthetic
  Monitor Closely (1)encorafenib, estrogens conjugated synthetic. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• estrogens esterified
  Monitor Closely (1)encorafenib, estrogens esterified. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• estropipate
  Monitor Closely (1)encorafenib, estropipate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• eszopiclone
  Monitor Closely (1)encorafenib, eszopiclone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ethinylestradiol
  Monitor Closely (1)encorafenib will increase the level or effect of ethinylestradiol by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)encorafenib will decrease the level or effect of ethinylestradiol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Since encorafenib can cause fetal harm, advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.

• ethosuximide
  Monitor Closely (1)encorafenib, ethosuximide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• etoposide
  Monitor Closely (1)encorafenib, etoposide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• etrasimod
  Serious - Use Alternative (1)etrasimod, encorafenib. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Risk of additive immune system effects with etrasimod has not been studied in combination with antineoplastic, immune-modulating, or noncorticosteroid immunosuppressive therapies. Avoid coadministration during and in the weeks following administration of etrasimod. .

• etravirine
  Monitor Closely (1)encorafenib, etravirine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)etravirine will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• everolimus
  Monitor Closely (1)encorafenib, everolimus. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• exemestane
  Monitor Closely (1)encorafenib, exemestane. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ezetimibe
  Monitor Closely (1)encorafenib will increase the level or effect of ezetimibe by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• fedratinib
  Monitor Closely (1)fedratinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Adjust dose of drugs that are CYP3A4 substrates as necessary.Serious - Use Alternative (1)encorafenib will decrease the level or effect of fedratinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Effect of coadministering a moderate CYP3A4 inducer with fedratinib has not been studied.

• felbamate
  Monitor Closely (1)encorafenib, felbamate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• felodipine
  Monitor Closely (1)encorafenib, felodipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• fentanyl
  Monitor Closely (1)encorafenib, fentanyl. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• fentanyl intranasal
  Monitor Closely (1)encorafenib, fentanyl intranasal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• fentanyl transdermal
  Monitor Closely (1)encorafenib, fentanyl transdermal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• fentanyl transmucosal
  Monitor Closely (1)encorafenib, fentanyl transmucosal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• fexinidazole
  Serious - Use Alternative (2)fexinidazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Fexinidazole inhibits CYP3A4. Coadministration may increase risk for adverse effects of CYP3A4 substrates.
  fexinidazole and encorafenib both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of fexinidazole with drugs known to block potassium channels or prolong QT interval.

• fexofenadine
  Monitor Closely (1)encorafenib will increase the level or effect of fexofenadine by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• finerenone
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• fingolimod
  Serious - Use Alternative (1)fingolimod and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• flecainide
  Serious - Use Alternative (1)encorafenib and flecainide both increase QTc interval. Avoid or Use Alternate Drug.

• fluconazole
  Serious - Use Alternative (2)fluconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and fluconazole both increase QTc interval. Contraindicated.

• fluoxetine
  Serious - Use Alternative (1)encorafenib and fluoxetine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• fluphenazine
  Monitor Closely (1)encorafenib and fluphenazine both increase QTc interval. Use Caution/Monitor.

• flurazepam
  Monitor Closely (1)encorafenib, flurazepam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• fluvastatin
  Monitor Closely (1)encorafenib will increase the level or effect of fluvastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• fluvoxamine
  Serious - Use Alternative (1)encorafenib and fluvoxamine both increase QTc interval. Avoid or Use Alternate Drug.

• formoterol
  Monitor Closely (1)encorafenib and formoterol both increase QTc interval. Use Caution/Monitor.

• fosamprenavir
  Monitor Closely (1)encorafenib, fosamprenavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)fosamprenavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• fosaprepitant
  Monitor Closely (1)encorafenib, fosaprepitant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)fosaprepitant will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• foscarnet
  Serious - Use Alternative (1)encorafenib and foscarnet both increase QTc interval. Avoid or Use Alternate Drug.

• fosphenytoin
  Serious - Use Alternative (1)fosphenytoin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• fostamatinib
  Monitor Closely (1)encorafenib, fostamatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)fostamatinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• fostemsavir
  Monitor Closely (1)encorafenib and fostemsavir both increase QTc interval. Use Caution/Monitor. QTc prolongation reported with higher than recommended doses of fostemsavir.

• fruquintinib
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of fruquintinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with moderate CYP3A4 inducers is unavoidable, continue to administer fruquintinib at recommended dosage.

• gadobenate
  Monitor Closely (1)encorafenib and gadobenate both increase QTc interval. Use Caution/Monitor.

• ganaxolone
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of ganaxolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of ganaxolone with moderate or strong CYP3A4 inducers. If coadministration unavoidable, consider increasing ganaxolone dose; however, do not exceed maximum daily dose for weight.

• gefitinib
  Monitor Closely (1)encorafenib, gefitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• gemifloxacin
  Serious - Use Alternative (1)encorafenib and gemifloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• gemtuzumab
  Serious - Use Alternative (1)encorafenib and gemtuzumab both increase QTc interval. Avoid or Use Alternate Drug.

• gepirone
  Monitor Closely (2)encorafenib will increase the level or effect of gepirone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce gepirone dose by 50% when used concomitantly with a moderate CYP3A4 inhibitor.
  gepirone and encorafenib both increase QTc interval. Modify Therapy/Monitor Closely.

• gilteritinib
  Serious - Use Alternative (1)encorafenib and gilteritinib both increase QTc interval. Avoid or Use Alternate Drug.

• givinostat
  Serious - Use Alternative (1)encorafenib and givinostat both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid coadministration, obtain ECGs when initiating, during concomitant use, and as clinically indicated. Withhold if QTc interval >500 ms or a change from baseline >60 ms.

• glasdegib
  Serious - Use Alternative (1)encorafenib and glasdegib both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, monitor for increased risk of QTc interval prolongation.

• glecaprevir/pibrentasvir
  Monitor Closely (2)encorafenib, glecaprevir/pibrentasvir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of glecaprevir/pibrentasvir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• glyburide
  Monitor Closely (1)encorafenib will increase the level or effect of glyburide by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• goserelin
  Serious - Use Alternative (1)encorafenib and goserelin both increase QTc interval. Avoid or Use Alternate Drug.

• granisetron
  Serious - Use Alternative (1)encorafenib and granisetron both increase QTc interval. Avoid or Use Alternate Drug.

• grapefruit
  Serious - Use Alternative (1)grapefruit will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• guanfacine
  Monitor Closely (1)encorafenib, guanfacine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• haloperidol
  Monitor Closely (1)encorafenib, haloperidol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and haloperidol both increase QTc interval. Avoid or Use Alternate Drug.

• histrelin
  Serious - Use Alternative (1)encorafenib and histrelin both increase QTc interval. Avoid or Use Alternate Drug.

• hydrocodone
  Monitor Closely (1)encorafenib, hydrocodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• hydroxychloroquine sulfate
  Serious - Use Alternative (2)encorafenib and hydroxychloroquine sulfate both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.
  hydroxychloroquine sulfate and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• hydroxyprogesterone caproate (DSC)
  Monitor Closely (1)encorafenib, hydroxyprogesterone caproate (DSC). affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• hydroxyzine
  Serious - Use Alternative (1)encorafenib and hydroxyzine both increase QTc interval. Avoid or Use Alternate Drug.

• ibrutinib
  Monitor Closely (1)encorafenib, ibrutinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ibutilide
  Serious - Use Alternative (1)encorafenib and ibutilide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• idelalisib
  Monitor Closely (1)encorafenib, idelalisib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)idelalisib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• iloperidone
  Serious - Use Alternative (2)iloperidone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and iloperidone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• imatinib
  Monitor Closely (2)encorafenib, imatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of imatinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP and OATP1B3 inhibitor) may increase the concentration and toxicities of BCRP and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)imatinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• imipramine
  Serious - Use Alternative (1)encorafenib and imipramine both increase QTc interval. Avoid or Use Alternate Drug.

• indacaterol, inhaled
  Monitor Closely (1)encorafenib and indacaterol, inhaled both increase QTc interval. Use Caution/Monitor.

• infigratinib (DSC)
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of infigratinib (DSC) by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• inotuzumab
  Serious - Use Alternative (1)encorafenib and inotuzumab both increase QTc interval. Avoid or Use Alternate Drug.

• irinotecan
  Monitor Closely (2)encorafenib, irinotecan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of irinotecan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• irinotecan liposomal
  Monitor Closely (1)encorafenib, irinotecan liposomal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• isavuconazonium sulfate
  Contraindicated (2)isavuconazonium sulfate will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Monitor if isavuconazonium (a CYP3A4 substrate) is coadministered with encorafenib (a CYP3A4 inhibitor and inducer).
  encorafenib, isavuconazonium sulfate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Monitor if isavuconazonium (a CYP3A4 substrate) is coadministered with encorafenib (a CYP3A4 inhibitor and inducer).

• isoflurane
  Serious - Use Alternative (1)encorafenib and isoflurane both increase QTc interval. Avoid or Use Alternate Drug.

• isoniazid
  Serious - Use Alternative (1)isoniazid will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• isosorbide dinitrate
  Monitor Closely (1)encorafenib, isosorbide dinitrate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• isosorbide mononitrate
  Monitor Closely (1)encorafenib, isosorbide mononitrate. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• isradipine
  Monitor Closely (1)encorafenib, isradipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• istradefylline
  Monitor Closely (1)istradefylline will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of CYP3A4 substrates in clinical trials. This effect was not observed with istradefylline 20 mg/day. Consider dose reduction of sensitive CYP3A4 substrates.

• itraconazole
  Serious - Use Alternative (2)itraconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and itraconazole both increase QTc interval. Avoid or Use Alternate Drug.

• ivacaftor
  Monitor Closely (1)encorafenib will increase the level or effect of ivacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce ivacaftor dose if coadministered with moderate CYP3A4 inhibitors. See specific ivacaftor-containing product for precise dosage modification.

• ivosidenib
  Serious - Use Alternative (1)ivosidenib and encorafenib both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of QTc prolonging drugs with ivosidenib or replace with alternate therapies. If coadministration of a QTc prolonging drug is unavoidable, monitor for increased risk of QTc interval prolongation.

• ixabepilone
  Monitor Closely (1)encorafenib, ixabepilone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ixazomib
  Monitor Closely (1)encorafenib, ixazomib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ketamine
  Monitor Closely (1)encorafenib, ketamine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ketoconazole
  Monitor Closely (1)encorafenib, ketoconazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)ketoconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If use is unavoidable, reduce encorafenib dose to 150 mg/day if current dose is 450 mg/day and 75 mg/day if current dose is 150-300mg/day. After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• lansoprazole
  Monitor Closely (1)encorafenib, lansoprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• lapatinib
  Monitor Closely (2)encorafenib, lapatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of lapatinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)encorafenib and lapatinib both increase QTc interval. Avoid or Use Alternate Drug.

• larotrectinib
  Minor (1)larotrectinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ledipasvir/sofosbuvir
  Monitor Closely (1)encorafenib will increase the level or effect of ledipasvir/sofosbuvir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• lefamulin
  Serious - Use Alternative (1)lefamulin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• leflunomide
  Monitor Closely (1)encorafenib will increase the level or effect of leflunomide by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• lemborexant
  Serious - Use Alternative (1)encorafenib, lemborexant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of lemborexant with drugs that may inhibit or induce CYP3A.

• lenacapavir
  Serious - Use Alternative (2)encorafenib will decrease the level or effect of lenacapavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of lenacapavir with moderate CYP3A4 inducers.
  lenacapavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the current encorafenib dose. After the inhibitor has been discontinued for 3 to 5 elimination half-lives, resume encorafenib dose that was taken before initiating the CYP3A4 inhibitor.

• leniolisib
  Serious - Use Alternative (1)encorafenib, leniolisib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib, an inhibitor and inducer of CYP3A4, may either increase or decrease leniolisib systemic exposure .

• lenvatinib
  Monitor Closely (1)encorafenib will increase the level or effect of lenvatinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)encorafenib and lenvatinib both increase QTc interval. Avoid or Use Alternate Drug.

• letermovir
  Monitor Closely (1)encorafenib will increase the level or effect of letermovir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)letermovir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• leuprolide
  Serious - Use Alternative (1)encorafenib and leuprolide both increase QTc interval. Avoid or Use Alternate Drug.

• levalbuterol
  Monitor Closely (1)encorafenib and levalbuterol both increase QTc interval. Use Caution/Monitor.

• levamlodipine
  Monitor Closely (1)encorafenib will decrease the level or effect of levamlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. No information is available on the quantitative effects of CYP3A4 inducers on amlodipine. Closely monitor blood pressure when amlodipine is coadministered with CYP3A4 inducers.

• levofloxacin
  Serious - Use Alternative (1)encorafenib and levofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• levoketoconazole
  Monitor Closely (1)encorafenib, levoketoconazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)levoketoconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If use is unavoidable, reduce encorafenib dose to 150 mg/day if current dose is 450 mg/day and 75 mg/day if current dose is 150-300mg/day. After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• levomilnacipran
  Monitor Closely (1)encorafenib, levomilnacipran. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• levonorgestrel intrauterine
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of levonorgestrel intrauterine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Since encorafenib can cause fetal harm, advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.

• levonorgestrel oral
  Monitor Closely (1)encorafenib, levonorgestrel oral. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• levonorgestrel oral/ethinylestradiol/ferrous bisglycinate
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Encorafenib can cause fetal harm. Advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.

• levonorgestrel transdermal
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of levonorgestrel transdermal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of encorafenib with hormonal contraceptives (CYP3A4 substrates) can result in decreased concentrations and loss of hormonal contraceptive efficacy. Since encorafenib can cause fetal harm, advise women of childbearing potential to use a highly effective nonhormonal contraceptive during treatment and for 2 weeks after final encorafenib dose.

• lidocaine
  Monitor Closely (1)encorafenib, lidocaine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• linagliptin
  Monitor Closely (1)encorafenib, linagliptin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• lithium
  Serious - Use Alternative (1)encorafenib and lithium both increase QTc interval. Avoid or Use Alternate Drug.

• lofexidine
  Serious - Use Alternative (1)encorafenib and lofexidine both increase QTc interval. Avoid or Use Alternate Drug.

• lomitapide
  Monitor Closely (1)encorafenib, lomitapide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• lonafarnib
  Contraindicated (1)encorafenib, lonafarnib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Lonafarnib is a sensitive CYP3A4 substrate that is contraindicated with strong or moderate CYP3A4 inhibitors or inducers. Encorafenib is both a CYP3A4 inhibitor and an inducer.

• lopinavir
  Monitor Closely (1)encorafenib, lopinavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (2)lopinavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and lopinavir both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• lorlatinib
  Serious - Use Alternative (2)encorafenib will decrease the level or effect of lorlatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of lorlatinib with moderate CYP3A inducers. If unable to avoid, monitor ALT, AST, and bilirubin as recommended.
  lorlatinib will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• losartan
  Monitor Closely (1)encorafenib, losartan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• lovastatin
  Monitor Closely (2)encorafenib, lovastatin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of lovastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• lumateperone
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of lumateperone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• lumefantrine
  Monitor Closely (1)encorafenib, lumefantrine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and lumefantrine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• lurasidone
  Monitor Closely (1)encorafenib, lurasidone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• lurbinectedin
  Serious - Use Alternative (1)encorafenib, lurbinectedin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Lurbinectedin is a CYP3A4 substrate. Coadministration with encorafenib (a CYP3A4 inhibitor and inducer) may increase or decrease plasma levels. Monitor for lurbinectedin toxicities or possible decreases in efficacy.

• macimorelin
  Monitor Closely (1)encorafenib, macimorelin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and macimorelin both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• macitentan
  Monitor Closely (1)encorafenib, macitentan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• maprotiline
  Serious - Use Alternative (1)encorafenib and maprotiline both increase QTc interval. Avoid or Use Alternate Drug.

• maraviroc
  Monitor Closely (1)encorafenib, maraviroc. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• marijuana
  Monitor Closely (1)encorafenib, marijuana. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• mavacamten
  Contraindicated (1)encorafenib decreases levels of mavacamten by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.

• mavorixafor
  Monitor Closely (2)encorafenib, mavorixafor. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Encorafenib inhibits and induces CYP3A4. .
  mavorixafor and encorafenib both increase QTc interval. Modify Therapy/Monitor Closely. Mavorixafor causes concentration-dependent QTc prolongation. Monitor QTc during treatment in patients with risk factors for QTc prolongation (eg, coadministered medications that increase mavorixafor exposure or other drugs with a high risk to prolong the QTc interval). Mavorixafor dose reduction or discontinuation may be required.

• medroxyprogesterone
  Monitor Closely (1)encorafenib, medroxyprogesterone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• mefloquine
  Monitor Closely (1)encorafenib, mefloquine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and mefloquine both increase QTc interval. Avoid or Use Alternate Drug.

• mestranol
  Monitor Closely (1)encorafenib, mestranol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• metaxalone
  Monitor Closely (1)encorafenib, metaxalone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• methadone
  Monitor Closely (1)encorafenib, methadone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and methadone both increase QTc interval. Avoid or Use Alternate Drug.

• methotrexate
  Monitor Closely (1)encorafenib will increase the level or effect of methotrexate by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• methylergonovine
  Monitor Closely (1)encorafenib, methylergonovine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• methylprednisolone
  Monitor Closely (1)encorafenib, methylprednisolone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• midazolam
  Monitor Closely (1)encorafenib, midazolam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• midostaurin
  Monitor Closely (1)encorafenib, midostaurin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and midostaurin both increase QTc interval. Avoid or Use Alternate Drug.

• mifepristone
  Monitor Closely (1)encorafenib, mifepristone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (2)mifepristone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and mifepristone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• mirtazapine
  Monitor Closely (1)encorafenib, mirtazapine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and mirtazapine both increase QTc interval. Avoid or Use Alternate Drug.

• mitotane
  Serious - Use Alternative (1)mitotane will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• mitoxantrone
  Monitor Closely (1)encorafenib will increase the level or effect of mitoxantrone by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• modafinil
  Monitor Closely (1)encorafenib, modafinil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• momelotinib
  Monitor Closely (1)encorafenib increases toxicity of momelotinib by Other (see comment). Use Caution/Monitor. Comment: OATP1B1/B3 inhibitor increases momelotinib (OATP1B1/B3 subtrate) plasma concentrations, which may increase the risk of adverse reactions with momelotinib.

• moxifloxacin
  Serious - Use Alternative (1)encorafenib and moxifloxacin both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• nafcillin
  Serious - Use Alternative (1)nafcillin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• naldemedine
  Monitor Closely (1)encorafenib, naldemedine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• naloxegol
  Monitor Closely (1)encorafenib, naloxegol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• nefazodone
  Monitor Closely (1)encorafenib, nefazodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)nefazodone will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• nelfinavir
  Monitor Closely (1)encorafenib, nelfinavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)nelfinavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• netupitant/palonosetron
  Monitor Closely (1)encorafenib, netupitant/palonosetron. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)netupitant/palonosetron will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• nevirapine
  Monitor Closely (1)encorafenib, nevirapine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• nicardipine
  Monitor Closely (1)encorafenib, nicardipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• nifedipine
  Monitor Closely (1)encorafenib, nifedipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• nilotinib
  Monitor Closely (1)encorafenib, nilotinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (2)nilotinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and nilotinib both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• nimodipine
  Monitor Closely (1)encorafenib, nimodipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• nirmatrelvir
  Serious - Use Alternative (1)nirmatrelvir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration owing to potential risk of serious adverse events (eg, QT interval prolongation).

• nirmatrelvir/ritonavir
  Serious - Use Alternative (1)nirmatrelvir/ritonavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration owing to potential risk of serious adverse events (eg, QT interval prolongation).

• nirogacestat
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of nirogacestat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• nisoldipine
  Monitor Closely (1)encorafenib, nisoldipine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• nitrofurantoin
  Minor (1)encorafenib will increase the level or effect of nitrofurantoin by Other (see comment). Minor/Significance Unknown. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• norethindrone
  Monitor Closely (1)encorafenib, norethindrone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• norgestrel
  Monitor Closely (1)encorafenib will decrease the level or effect of norgestrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Moderate CYP3A4 inducers may decrease progestin concentration; consider use of additional barrier methods

• nortriptyline
  Serious - Use Alternative (1)encorafenib and nortriptyline both increase QTc interval. Avoid or Use Alternate Drug.

• octreotide
  Serious - Use Alternative (1)encorafenib and octreotide both increase QTc interval. Avoid or Use Alternate Drug.

• ofloxacin
  Serious - Use Alternative (1)encorafenib and ofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• olanzapine
  Serious - Use Alternative (1)encorafenib and olanzapine both increase QTc interval. Avoid or Use Alternate Drug. Limited data, including some case reports, suggest that olanzapine may be associated with a significant prolongation of the QTc interval in rare instances

• olaparib
  Monitor Closely (1)encorafenib, olaparib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• oliceridine
  Monitor Closely (1)encorafenib will increase the level or effect of oliceridine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If concomitant use is necessary, may require less frequent oliceridine dosing. Closely monitor for respiratory depression and sedation and titrate subsequent doses accordingly. If inhibitor is discontinued, consider increase oliceridine dosage until stable drug effects are achieved. Monitor for signs of opioid withdrawal.

• olmesartan
  Monitor Closely (1)encorafenib will increase the level or effect of olmesartan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• olodaterol inhaled
  Monitor Closely (1)encorafenib and olodaterol inhaled both increase QTc interval. Use Caution/Monitor.

• olutasidenib
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of olutasidenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Strong or moderate CYP3A inducers decrease olutasidenib (a CYP3A4 substrate) plasma concentrations and efficacy.

• omaveloxolone
  Serious - Use Alternative (1)encorafenib, omaveloxolone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib may increase or decrease systemic exposure of omeveloxolone. .

• ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC)
  Serious - Use Alternative (1)ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC) will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• omeprazole
  Monitor Closely (1)encorafenib, omeprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ondansetron
  Monitor Closely (1)encorafenib, ondansetron. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and ondansetron both increase QTc interval. Avoid or Use Alternate Drug.

• osilodrostat
  Monitor Closely (1)osilodrostat and encorafenib both increase QTc interval. Use Caution/Monitor.

• osimertinib
  Monitor Closely (2)encorafenib, osimertinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of osimertinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)encorafenib and osimertinib both increase QTc interval. Avoid or Use Alternate Drug.

• ospemifene
  Monitor Closely (1)encorafenib, ospemifene. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• oxaliplatin
  Serious - Use Alternative (1)encorafenib and oxaliplatin both increase QTc interval. Avoid or Use Alternate Drug.

• oxycodone
  Monitor Closely (1)encorafenib, oxycodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ozanimod
  Monitor Closely (2)ozanimod and encorafenib both increase QTc interval. Modify Therapy/Monitor Closely. The potential additive effects on heart rate, treatment with ozanimod should generally not be initiated in patients who are concurrently treated with QT prolonging drugs with known arrhythmogenic properties.
  encorafenib will increase the level or effect of ozanimod by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• paclitaxel
  Monitor Closely (2)encorafenib, paclitaxel. affecting hepatic enzyme CYP2E1 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of paclitaxel by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• paclitaxel protein bound
  Monitor Closely (1)encorafenib, paclitaxel protein bound. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• pacritinib
  Contraindicated (1)encorafenib, pacritinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Encorafenib (a CYP3A4 inhibitor and inducer) may increase or decrease levels of pacritinib.

• palbociclib
  Monitor Closely (1)encorafenib, palbociclib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)palbociclib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• palifermin
  Serious - Use Alternative (1)palifermin increases toxicity of encorafenib by Other (see comment). Avoid or Use Alternate Drug. Comment: Palifermin should not be administered within 24 hr before, during infusion of, or within 24 hr after administration of antineoplastic agents. Coadministration of palifermin within 24 hr of chemotherapy resulted in increased severity and duration of oral mucositis.

• paliperidone
  Serious - Use Alternative (1)encorafenib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• palovarotene
  Monitor Closely (1)encorafenib will increase the level or effect of palovarotene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Avoid coadministration of palovarotene, a CYP3A substrate, with moderate CYP3A inhibitors. If unavoidable, reduce palovarotene dose by 50%.

• panobinostat
  Monitor Closely (1)encorafenib, panobinostat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and panobinostat both increase QTc interval. Avoid or Use Alternate Drug.

• pantoprazole
  Monitor Closely (1)encorafenib will increase the level or effect of pantoprazole by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• pasireotide
  Serious - Use Alternative (1)encorafenib and pasireotide both increase QTc interval. Avoid or Use Alternate Drug.

• pazopanib
  Monitor Closely (2)encorafenib, pazopanib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of pazopanib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)encorafenib and pazopanib both increase QTc interval. Avoid or Use Alternate Drug.

• pemigatinib
  Serious - Use Alternative (1)encorafenib, pemigatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of pemigatinib (a CYP3A4 substrate) with encorafenib (a CYP3A4 inducer and inhibitor) may increase or decrease plasma levels or effects of pemigatinib.

• pentamidine
  Serious - Use Alternative (1)encorafenib and pentamidine both increase QTc interval. Avoid or Use Alternate Drug.

• perampanel
  Monitor Closely (1)encorafenib, perampanel. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• perphenazine
  Monitor Closely (1)encorafenib and perphenazine both increase QTc interval. Use Caution/Monitor.

• pexidartinib
  Serious - Use Alternative (1)encorafenib, pexidartinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of pexidartinib (a CYP3A4 substrate) with encorafenib (a CYP3A4 inducer and inhibitor) may increase or decrease plasma levels or effects of pexidartinib.

• phenobarbital
  Serious - Use Alternative (1)phenobarbital will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• phenytoin
  Serious - Use Alternative (1)phenytoin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• pimavanserin
  Monitor Closely (1)encorafenib, pimavanserin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and pimavanserin both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• pimozide
  Serious - Use Alternative (1)encorafenib and pimozide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• pirtobrutinib
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of pirtobrutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration unavoidable, increase pirtobrutinib dose to 300 mg qDay (if dose is 200 mg qDay) or increase pirtobrutinib dose by 50 mg (if current pirtobrutinib dose is 50 mg or 100 mg qDay).

• pitavastatin
  Monitor Closely (1)encorafenib will increase the level or effect of pitavastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• pitolisant
  Serious - Use Alternative (1)encorafenib and pitolisant both increase QTc interval. Avoid or Use Alternate Drug.

• ponatinib
  Monitor Closely (1)encorafenib, ponatinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ponesimod
  Serious - Use Alternative (1)encorafenib and ponesimod both increase QTc interval. Avoid or Use Alternate Drug.

• posaconazole
  Serious - Use Alternative (2)posaconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  encorafenib and posaconazole both increase QTc interval. Avoid or Use Alternate Drug.

• pravastatin
  Monitor Closely (1)encorafenib will increase the level or effect of pravastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• praziquantel
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of praziquantel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• pretomanid
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of pretomanid by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Pretomanid is a CYP3A4 substrate. Avoid coadministration of strong or moderate CYP3A4 inducers.

• primaquine
  Monitor Closely (1)encorafenib, primaquine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and primaquine both increase QTc interval. Avoid or Use Alternate Drug.

• primidone
  Serious - Use Alternative (1)primidone will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• procainamide
  Serious - Use Alternative (1)encorafenib and procainamide both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• prochlorperazine
  Monitor Closely (1)encorafenib and prochlorperazine both decrease QTc interval. Use Caution/Monitor.

• progesterone intravaginal gel
  Monitor Closely (1)encorafenib, progesterone intravaginal gel. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• progesterone micronized
  Monitor Closely (1)encorafenib, progesterone micronized. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• promazine
  Serious - Use Alternative (1)encorafenib and promazine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• promethazine
  Serious - Use Alternative (1)encorafenib and promethazine both decrease QTc interval. Avoid or Use Alternate Drug.

• propafenone
  Serious - Use Alternative (1)encorafenib and propafenone both increase QTc interval. Avoid or Use Alternate Drug.

• protriptyline
  Serious - Use Alternative (1)encorafenib and protriptyline both increase QTc interval. Avoid or Use Alternate Drug.

• quetiapine
  Monitor Closely (1)encorafenib, quetiapine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and quetiapine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• quinidine
  Monitor Closely (1)encorafenib, quinidine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and quinidine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• quinine
  Monitor Closely (1)encorafenib, quinine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and quinine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• quinupristin/dalfopristin
  Serious - Use Alternative (1)quinupristin/dalfopristin will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• quizartinib
  Monitor Closely (1)quizartinib, encorafenib. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Monitor patients more frequently with ECG if coadministered with QT prolonging drugs.Serious - Use Alternative (1)encorafenib will decrease the level or effect of quizartinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rabeprazole
  Monitor Closely (1)encorafenib, rabeprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ranolazine
  Monitor Closely (1)encorafenib, ranolazine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and ranolazine both increase QTc interval. Avoid or Use Alternate Drug.

• regorafenib
  Monitor Closely (1)encorafenib, regorafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• repaglinide
  Monitor Closely (2)encorafenib, repaglinide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of repaglinide by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• repotrectinib
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of repotrectinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• revefenacin
  Monitor Closely (1)encorafenib will increase the level or effect of revefenacin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• ribociclib
  Monitor Closely (1)encorafenib, ribociclib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (3)ribociclib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.
  ribociclib increases toxicity of encorafenib by QTc interval. Avoid or Use Alternate Drug.
  encorafenib and ribociclib both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• rifabutin
  Monitor Closely (1)encorafenib, rifabutin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)rifabutin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rifampin
  Monitor Closely (1)encorafenib will increase the level or effect of rifampin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)rifampin will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rifapentine
  Serious - Use Alternative (1)rifapentine will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rilpivirine
  Serious - Use Alternative (1)encorafenib and rilpivirine both increase QTc interval. Avoid or Use Alternate Drug.

• rimegepant
  Serious - Use Alternative (1)encorafenib, rimegepant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of rimegepant (a CYP3A4 substrate) with drugs that both inhibit and induce CYP3A4 (eg, encorafenib).

• riociguat
  Monitor Closely (2)encorafenib, riociguat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of riociguat by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• ripretinib
  Monitor Closely (1)encorafenib will decrease the level or effect of ripretinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If coadministration cannot be avoided, increase dosing frequency from recommended dose of 150 mg once daily to 150 mg twice daily during co-administration period; monitor for clinical response and tolerability

• risperidone
  Serious - Use Alternative (1)encorafenib and risperidone both increase QTc interval. Avoid or Use Alternate Drug.

• ritonavir
  Monitor Closely (1)encorafenib, ritonavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)ritonavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• rivaroxaban
  Monitor Closely (1)encorafenib, rivaroxaban. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• roflumilast
  Monitor Closely (1)encorafenib, roflumilast. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• rolapitant
  Monitor Closely (1)encorafenib, rolapitant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• romidepsin
  Monitor Closely (1)encorafenib, romidepsin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and romidepsin both increase QTc interval. Avoid or Use Alternate Drug.

• ropivacaine
  Monitor Closely (1)encorafenib, ropivacaine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• rosuvastatin
  Monitor Closely (1)encorafenib will increase the level or effect of rosuvastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• rucaparib
  Monitor Closely (1)rucaparib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Adjust dosage of CYP3A4 substrates, if clinically indicated.

• ruxolitinib
  Monitor Closely (1)encorafenib, ruxolitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ruxolitinib topical
  Monitor Closely (1)encorafenib, ruxolitinib topical. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• salmeterol
  Monitor Closely (2)encorafenib, salmeterol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib and salmeterol both increase QTc interval. Use Caution/Monitor.

• saxagliptin
  Monitor Closely (1)encorafenib, saxagliptin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• schisandra
  Serious - Use Alternative (1)schisandra will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• seladelpar
  Monitor Closely (2)encorafenib increases levels of seladelpar by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Caution in patients who are poor CYP2C9 metabolizers taking seladelpar and are coadministered a moderate/strong CYP3A4 inhibitor.
  encorafenib increases levels of seladelpar by Other (see comment). Use Caution/Monitor. Comment: Monitor seladelpar for adverse effects if coadministered with BCRP inhibitors.

• selexipag
  Monitor Closely (1)encorafenib will increase the level or effect of selexipag by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• selpercatinib
  Monitor Closely (1)selpercatinib increases toxicity of encorafenib by QTc interval. Use Caution/Monitor.

• selumetinib
  Monitor Closely (1)encorafenib will increase the level or effect of selumetinib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)encorafenib will decrease the level or effect of selumetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• sertraline
  Serious - Use Alternative (1)encorafenib and sertraline both increase QTc interval. Avoid or Use Alternate Drug.

• sevoflurane
  Serious - Use Alternative (1)encorafenib and sevoflurane both increase QTc interval. Avoid or Use Alternate Drug.

• sildenafil
  Monitor Closely (1)encorafenib, sildenafil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• simvastatin
  Monitor Closely (2)encorafenib, simvastatin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of simvastatin by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• siponimod
  Monitor Closely (1)siponimod and encorafenib both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Caution if coadministered because of additive immunosuppressive effects during such therapy and in the weeks following administration. When switching from drugs with prolonged immune effects, consider the half-life and mode of action of these drugs to avoid unintended additive immunosuppressive effects.Serious - Use Alternative (2)encorafenib will decrease the level or effect of siponimod by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of siponimod with a drug that causes moderate CYP2C9 plus a moderate or strong CYP3A4 inducer is not recommended. Coadministration with moderate or strong CYP3A4 inducers alone is not recommended for patients with CYP2C9*1/*3 and*2/*3 genotype.
  encorafenib and siponimod both increase QTc interval. Avoid or Use Alternate Drug.

• sirolimus
  Monitor Closely (1)encorafenib, sirolimus. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• sofosbuvir
  Monitor Closely (1)encorafenib will increase the level or effect of sofosbuvir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• solifenacin
  Monitor Closely (1)encorafenib, solifenacin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and solifenacin both increase QTc interval. Avoid or Use Alternate Drug.

• sonidegib
  Monitor Closely (1)encorafenib, sonidegib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• sorafenib
  Monitor Closely (1)encorafenib, sorafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and sorafenib both increase QTc interval. Avoid or Use Alternate Drug.

• sotalol
  Serious - Use Alternative (1)encorafenib and sotalol both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• sparsentan
  Monitor Closely (1)encorafenib will increase the level or effect of sparsentan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. No dosage adjustment needed. Monitor blood pressure, serum potassium, edema, and kidney function regularly if sparsentan is coadministered with moderate CYP3A4 inhibitors.

• stiripentol
  Monitor Closely (2)encorafenib will decrease the level or effect of stiripentol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor closely if stiripentol is coadministered with a moderate CYP3A4 inducer.
  stiripentol, encorafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Stiripentol is a CYP3A4 inhibitor and inducer. Monitor CYP3A4 substrates coadministered with stiripentol for increased or decreased effects. CYP3A4 substrates may require dosage adjustment.

• sufentanil
  Monitor Closely (1)encorafenib, sufentanil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• sufentanil SL
  Monitor Closely (1)encorafenib, sufentanil SL. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of sufentanil SL with encorafenib, a CYP3A4 inhibitor and inducer, may increase sufentanil plasma concentration, and, thereby increase or prolonged adverse effects, including potentially fatal respiratory depression. Encorafenib may also induce sufentanil, and thereby reduce levels and efficacy.

• sulbactam/durlobactam
  Serious - Use Alternative (1)encorafenib will increase the level or effect of sulbactam/durlobactam by Other (see comment). Avoid or Use Alternate Drug. Sulbactam is predicted to have active secretion by OATP1 as a significant portion of total clearance; therefore, inhibition of OAT1 may increase sulbactam plasma concentrations

• sulfasalazine
  Monitor Closely (1)encorafenib will increase the level or effect of sulfasalazine by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• sunitinib
  Monitor Closely (1)encorafenib, sunitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and sunitinib both increase QTc interval. Avoid or Use Alternate Drug.

• suvorexant
  Monitor Closely (1)encorafenib, suvorexant. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tacrolimus
  Monitor Closely (1)encorafenib, tacrolimus. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and tacrolimus both increase QTc interval. Avoid or Use Alternate Drug.

• tacrolimus ointment
  Monitor Closely (1)encorafenib, tacrolimus ointment. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tadalafil
  Monitor Closely (1)encorafenib, tadalafil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• talazoparib
  Monitor Closely (1)encorafenib will increase the level or effect of talazoparib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• tamoxifen
  Monitor Closely (1)encorafenib, tamoxifen. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tamsulosin
  Monitor Closely (1)encorafenib, tamsulosin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tasimelteon
  Monitor Closely (1)encorafenib, tasimelteon. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tazemetostat
  Monitor Closely (1)tazemetostat will decrease the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Serious - Use Alternative (1)encorafenib, tazemetostat. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of tazemetostat with moderate and strong CYP3A4 inhibitors or inducers.

• telavancin
  Serious - Use Alternative (1)encorafenib and telavancin both increase QTc interval. Avoid or Use Alternate Drug.

• telmisartan
  Monitor Closely (1)encorafenib will increase the level or effect of telmisartan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• temsirolimus
  Monitor Closely (1)encorafenib, temsirolimus. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• teniposide
  Monitor Closely (1)encorafenib, teniposide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tenofovir AF
  Monitor Closely (1)encorafenib will increase the level or effect of tenofovir AF by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• tenofovir DF
  Monitor Closely (1)encorafenib will increase the level or effect of tenofovir DF by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• tetrabenazine
  Serious - Use Alternative (1)encorafenib and tetrabenazine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• tetracycline
  Monitor Closely (1)encorafenib, tetracycline. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tezacaftor
  Monitor Closely (1)encorafenib, tezacaftor. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• theophylline
  Monitor Closely (1)encorafenib, theophylline. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• thioridazine
  Serious - Use Alternative (1)encorafenib and thioridazine both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• tiagabine
  Monitor Closely (1)encorafenib, tiagabine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• ticlopidine
  Monitor Closely (1)encorafenib, ticlopidine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tinidazole
  Monitor Closely (1)encorafenib, tinidazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tipranavir
  Monitor Closely (1)encorafenib, tipranavir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)tipranavir will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• tivozanib
  Monitor Closely (1)encorafenib will decrease the level or effect of tivozanib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tofacitinib
  Monitor Closely (1)encorafenib, tofacitinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tolterodine
  Monitor Closely (1)encorafenib, tolterodine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tolvaptan
  Monitor Closely (1)encorafenib, tolvaptan. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• topotecan
  Monitor Closely (1)encorafenib will increase the level or effect of topotecan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• toremifene
  Monitor Closely (1)encorafenib, toremifene. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and toremifene both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• trabectedin
  Monitor Closely (1)encorafenib, trabectedin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• tramadol
  Monitor Closely (1)encorafenib, tramadol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• trazodone
  Monitor Closely (1)encorafenib, trazodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and trazodone both increase QTc interval. Avoid or Use Alternate Drug.

• triazolam
  Monitor Closely (1)encorafenib, triazolam. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• triclabendazole
  Monitor Closely (1)triclabendazole and encorafenib both increase QTc interval. Use Caution/Monitor.

• trifluoperazine
  Monitor Closely (1)encorafenib and trifluoperazine both decrease QTc interval. Use Caution/Monitor.

• trimethoprim
  Monitor Closely (1)encorafenib, trimethoprim. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• trimipramine
  Monitor Closely (1)encorafenib, trimipramine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and trimipramine both increase QTc interval. Avoid or Use Alternate Drug.

• triptorelin
  Serious - Use Alternative (1)encorafenib and triptorelin both increase QTc interval. Avoid or Use Alternate Drug.

• troglitazone
  Monitor Closely (1)encorafenib will increase the level or effect of troglitazone by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 inhibitor) may increase the concentration and toxicities of OATP1B1 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• tucatinib
  Serious - Use Alternative (1)tucatinib will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of tucatinib with CYP3A substrates, where minimal concentration changes may lead to serious or life-threatening toxicities. If unavoidable, reduce CYP3A substrate dose according to product labeling.

• ubrogepant
  Monitor Closely (2)encorafenib will decrease the level or effect of ubrogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Dose adjustment is recommended with concomitant use of ubrogepant and moderate and weak CYP3A4 inducers. (see Dosage Modifications)
  encorafenib will increase the level or effect of ubrogepant by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• ulipristal
  Monitor Closely (1)encorafenib, ulipristal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• umeclidinium bromide/vilanterol inhaled
  Monitor Closely (1)encorafenib and umeclidinium bromide/vilanterol inhaled both decrease QTc interval. Use Caution/Monitor.

• valbenazine
  Monitor Closely (2)encorafenib, valbenazine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  valbenazine and encorafenib both increase QTc interval. Use Caution/Monitor.

• valsartan
  Monitor Closely (1)encorafenib will increase the level or effect of valsartan by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1 and OATP1B3 inhibitor) may increase the concentration and toxicities of OATP1B1 and OATP1B3 substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• vandetanib
  Monitor Closely (1)encorafenib, vandetanib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and vandetanib both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• vardenafil
  Monitor Closely (1)encorafenib, vardenafil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and vardenafil both increase QTc interval. Avoid or Use Alternate Drug.

• velpatasvir
  Monitor Closely (2)encorafenib, velpatasvir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of velpatasvir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.

• vemurafenib
  Monitor Closely (2)encorafenib, vemurafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of vemurafenib by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a BCRP inhibitor) may increase the concentration and toxicities of BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates.Serious - Use Alternative (1)encorafenib and vemurafenib both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• venetoclax
  Monitor Closely (1)encorafenib, venetoclax. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• venlafaxine
  Monitor Closely (1)encorafenib, venlafaxine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)encorafenib and venlafaxine both decrease QTc interval. Avoid or Use Alternate Drug.

• verapamil
  Monitor Closely (1)encorafenib, verapamil. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.Serious - Use Alternative (1)verapamil will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a moderate CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-half of the dose (eg, reduce from 450 mg/day to 225 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• vilanterol/fluticasone furoate inhaled
  Monitor Closely (1)encorafenib and vilanterol/fluticasone furoate inhaled both increase QTc interval. Use Caution/Monitor.

• vilazodone
  Monitor Closely (1)encorafenib, vilazodone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• vinblastine
  Monitor Closely (1)encorafenib, vinblastine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• vincristine
  Monitor Closely (1)encorafenib, vincristine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• vincristine liposomal
  Monitor Closely (1)encorafenib, vincristine liposomal. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• vinorelbine
  Monitor Closely (1)encorafenib, vinorelbine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• voclosporin
  Monitor Closely (1)voclosporin, encorafenib. Either increases effects of the other by QTc interval. Use Caution/Monitor.Serious - Use Alternative (1)encorafenib will decrease the level or effect of voclosporin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• vonoprazan
  Serious - Use Alternative (1)encorafenib will decrease the level or effect of vonoprazan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• voriconazole
  Contraindicated (1)encorafenib and voriconazole both increase QTc interval. Contraindicated.Serious - Use Alternative (1)voriconazole will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

• vorinostat
  Serious - Use Alternative (1)encorafenib and vorinostat both increase QTc interval. Avoid or Use Alternate Drug.

• vortioxetine
  Monitor Closely (1)encorafenib, vortioxetine. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• voxilaprevir
  Monitor Closely (2)encorafenib, voxilaprevir. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.
  encorafenib will increase the level or effect of voxilaprevir by Other (see comment). Modify Therapy/Monitor Closely. Encorafenib (a OATP1B1, OATP1B3, and BCRP inhibitor) may increase the concentration and toxicities of OATP1B1, OATP1B3, and BCRP substrates. Closely monitor for signs and symptoms of increased exposure and consider adjusting the dose of these substrates. Screen reader support enabled.

• warfarin
  Monitor Closely (1)encorafenib, warfarin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Warfarin serum concentrations may be increased or decreased. Encorafenib it both an inhibitor and inducer of CYP3A4. The less potent R-enantiomer of warfarin is a substrate of CYP3A4.

• zanubrutinib
  Serious - Use Alternative (1)encorafenib, zanubrutinib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Encorafenib may inhibit or induce CYP3A4. .

• zavegepant intranasal
  Serious - Use Alternative (1)encorafenib will increase the level or effect of zavegepant intranasal by Other (see comment). Avoid or Use Alternate Drug. OATP1B3 inhibitors may result in a significant increase in systemic exposure of zavegepant (an OATP1B3 substrate).

• ziprasidone
  Serious - Use Alternative (1)encorafenib and ziprasidone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• zolpidem
  Monitor Closely (1)encorafenib, zolpidem. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• zonisamide
  Monitor Closely (1)encorafenib, zonisamide. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

• zuranolone
  Serious - Use Alternative (1)encorafenib, zuranolone. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use with drugs that inhibit and induce CYP3A4.