Formulation and Evaluation of Sustained Release Matrix Tablet of Valsartan

The aim of this study was to develop antihypertensive matrix tablets with sustained release of valsartan, an angiotensin type II receptor antagonist, using hydroxypropyl methylcellulose and combination of ethyl cellulose material as matrix in different proportions by wet granulation. The granules are evaluated by tapped density, bulk density, angle of repose and compressibility index. The tablets are tested for friability, hardness, weight variation and in vitro release. The granules showed good flow properties and compressibility properties and all tablet formulations showed pharmaceutical properties. The result of dissolution study indicate that the formulation prepared by combination of high grade HPMC K100M and ethyl cellulose showed maximum drug release for 12hrs and high drug release around 98.56% i.e., Formulation F8 is the best formulation.