Formulation and In-Vitro Evaluation of Controlled Release Matrix Tablets of Diltiazem Hydrochloride Using Different Rate Controlling Polymers

Fig. (5) Diltiazem Hydrochloride release from Ethocel 45 Premium matrices (10:1, 10:2 and 10:3) and Ethocel 45 Premium matrices (10:1, 10:2 and 10:3) matrices containing HPMC as co-excipient.