Tea Tree Oil | American College of Veterinary Pharmacists (original) (raw)
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Tea Tree Oilstorey2023-04-25T16:32:14-05:00
If you have any reason to suspect your pet has ingested something toxic, please contact your veterinarian or one of the other resources* listed:
• ASPCA Animal Poison Control Center 24-hour hotline at (888) 426-4435
• Pet Poison Helpline® 24-hour animal poison control service at (855) 764-7661
*The resources listed above are not affiliated with the American College of Veterinary Pharmacists (ACVP), and they may charge a consultation fee. ACVP provides this referral information solely as a public service and does not receive any compensation from these organizations.
Tea Tree Oil
Tea tree oil, also known as melaleuca oil, has increased in popularity with the heightened use of “natural remedies.” This ingredient can be found in gels, body lotions, shampoos, conditioners, balms, toothpaste, insect repellants, and other household products.
In veterinary practice, tea tree oil has been marketed for use on dogs, cats, ferrets, and horses to treat external parasites. Though appropriate dilutions of tea tree oil can be used, it is extremely important to talk with your veterinarian prior to use. Due to intoxication, 100% tea tree oil should never be used on an animal.
Birds are also indicated for this toxicity.
Signs and symptoms of toxicity: extremely low body temperature, weakness, decreased heart rate, difficulty walking, tremors, and skin irritation. Clinical signs may be seen within 1-2 hours of application but may take up to 8 hours to appear.
Toxic consumption:
The minimum toxicity threshold is unknown. All incidences of exposure should be reported immediately. Dose ranges of 1.9-5 g/kg (0.8 – 2.2 g/lb) or 1.9-2.6 mL/kg (0.8 – 1.1 mL/lb) may be fatal.
Intoxication is most often seen when 100% tea tree oil is used. As little as 7-8 drops (10-20 mL) applied to the skin may be fatal to both cats and dogs. Products with low concentrations (e.g. shampoos, body washes) are generally not considered toxic.
| Dogs: Tea Tree Oil Toxic/Lethal Consumption | |||||
|---|---|---|---|---|---|
| X-SmallYorkie, Chihuahua | SmallPug, Boston Terrier, Poodle | MediumBeagle, Scottish Terrier | LargeBoxer, Cocker Spaniel | X-LargeRetriever, German Shepherd | XX-LargeGreat Dane, St. Bernard |
| 1 – 10 lbs.(0.45 – 4.6 kg) | 11 – 25 lbs.(5 – 11.4 kg) | 26 – 40 lbs.(11.8 – 18.2 kg) | 41 – 70 lbs.(18.6 – 31.8 kg) | 71 – 90 lbs.(32.3 – 40.9 kg) | 91 – 110 lbs.(41.4 – 50 kg) |
 |
 |
 |
 |
 |
 |
| > 0.8 g or mL | > 9.4 g or mL | > 22 g or mL | > 35 g or mL | > 61 g or mL | > 78.5 g or mL |
| Cats: Tea Tree Oil Toxic/Lethal Consumption | |
|---|---|
| Most Cats | Large Cats |
| 1 – 10 lbs.(0.45 – 4.6 kg) | 11 – 25 lbs.(5 – 11.4 kg) |
 |
 |
| > 0.8 g or mL | > 9.4 g or mL |
References:
– Carson CF, Riley TV. Toxicity of the essential oil of Melaleuca alternifolia or tea tree oil. Clin Toxicol 1995; 33:193-194.
– Osweiler, G, et al. (2011). Blackwell’s five-minute veterinary consult clinical companion. Small Animal Toxicology. [Kindle version]. Retrieved from Amazon.com
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