Design and In vitro Evaluation of Glyburide Controlled Release Trilayer Matrix Tablets Using Natural Gums

ABSTRACT: The aim of the present study is to design and evaluate the controlled release Glyburide trilayer matrix tablets, to achieve zero-order drug release for sustained plasma concentration. Matrix tablets were prepared by direct compression whereas three-layer tablets were prepared by compressing polymer barrier layers on both sides of the core containing the drug. Formulations were prepared by using different grades of hydroxy propyl methyl cellulose and Ethyl cellulose. Based on the evaluation parameters, drug dissolution profile and release drug kinetics HF16 was found to be optimized formulation. These results also demonstrated the suitability of three-layered tablet formulation of Glyburide to provide controlled release for prolonged period and improved linearity for Glyburide in comparison to marketed product in the management of Diabetes. Keywords: Glyburide, Type II Diabetes, HPMC Grades, EC, MCC, Release order kinetics.