PREPARATION AND CHARACTERIZATION OF ENTERIC COATED MUCOADHESIVE TABLET OF CAPTOPRIL

Abstract

Delayed sustained release formulation is to retard release of the drug form the stomach and release in the intestinal pH. Captopril is recommended as first choice of drug. Attacks of the myocardial infarction are generally in the early morning or night. Captopril is showing less bioavailability in presence of food. With enteric coating problem should be solved out. It also minimizes the gastric irritation of the captopril. Captopril is widely used for the arterial hypertension. It also used for myocardial infarction and in diabetic nephropathy. The drug dose is taken three times daily, which may give poor patients compliance. In the present investigation, an attempt was made to decrease dosing frequency by prepare a mucoadhesive tablets using various polymers such as HPMC K4M, bael gum and chitosan. Eudragit RL100 used as enteric coating polymer. Formulations friability, drug content, surface pH, wash off test, mucoadhesive strength and dissolution study. The results of friability tests carried out for all the formulations are within the official limit and acceptable. According to wash off test the formulation containing bael gum showing better results. All the formulation was showing better swelling property. F4 (formulation containing bael gum) was showing best mucoadhesive strength among all the formulations.  In in-vitro drug release study formulation (F4) containing bael gum showing better control release among all the formulations i.e. 86.488 % in 12 hrs.