Design of Extended Release Matrix Tablet of Tramadol hydrochloride Using Combination of Hydrophobic and Hydrophilic Polymer (original) (raw)

International Journal of Pharmaceutical Sciences and Drug Research

The aim of design of oral extended drug delivery system is to achieve a prolonged therapeutic effect by continuously releasing medicament over an extended period of time after administration of a single dose. An attempt was made to formulate Tramadol Extended Release (ER) matrix tablet using combination of hydrophobic and hydrophilic polymer consisting of ethyl cellulose, HPMC K15M, carbopol, and xanthan gum. The polymeric concentration of hydrophobic and hydrophilic polymer was optimized and was found that drug to polymeric ratio (hydrophobic and hydrophilic) of 1:0.75:0.75 was appropriate for the formulation of Tramadol ER tablet. The concentration of hydrophobic polymer was kept constant were as the combination of hydrophilic polymer was attempted and combined to hydrophobic polymer to retard the drug release for 24-hour from the matrix tablet. A total of nine formulations (F1-F9) of Tramadol matrix tablet, with different concentration of hydrophobic and hydrophilic polymer were ...

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