OBJECTIVETo prepare the pH-dependent kuijiekang tablet for colon-specific delivery used in treating the ulcerative colitis and to develop the in vitro release method of kuijiekang tablets.METHODSThe coating prescription was screened by the in vitro delivery of Puerarin and Berberine hydrochloride. The in-vitro releasing property of the preparation was examined by the method of in-vitro delivery.RESULTSThe preparation methods of the pH-dependent kuijiekang tablet for colon-specific delivery was obtained from the in-vitro delivery, Puerarin and Berberine hydrochloride were not detected in the simulated gastric fluid after 2 h and the quantitied of Puerarin and Berberine hydrochlo4de were less 10% in the simulated intestinal fluid after 4 h. The quantities of Puerarin and Berberine hydrochloride were 90.07% and 89.87%.CONCLUSIONIt can be prepared and the preparation is a promising delivery system for drugs to be delivery to the colon.
