Diltiazem HCI is used as an antihypertensiON and has a very short half-Iife, making ii suitable if made in the form of microcapsules. Research using HPMC and Eudragit RS 30 D as coating end aimed at finding the best ratio of diltiazem HCI microcapsules prepared by spray drying method, in terms of the dissoluiion profile. The microcapsules are made in a homogeneous solution of the active substan…