OBJECTIVE:To 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.
METHODS:The 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.
RESULTS:The 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%.
CONCLUSION:It can be prepared and the preparation is a promising delivery system for drugs to be delivery to the colon.