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Formulation and Evaluation of Sustained Release Pellets of Verapamil HCL

Verapamil Hydrochloride, an antihypertensive agent which is used as a calcium channel blocker. The aim of the present study was to formulate and evaluate Verapamil HCL sustained release pellets. The work is to obtain Verapamil HCL sustained release pellets by using HPMC based polymers i.e., HPMC AN6, HPMC E5, HPMC E15 in the sustained release layer. The verapamil Hydrochloride has pH-dependent solubility. To overcome the pH dependent solubility Fumaric acid was used that which provides micro-acidic environment. Different Ratios of Ethyl-cellulose and HPMC polymers were used to optimise and evaluate the formulation for the sustained release of the drug. It uses the Pelletization technology. This technique is practised to produce pellets of uniform size with high drug loading capacity and also to prevent the segregation and dust.