Objective To prepare the colon-positioning-timing tablets of berberine from Chinese compound formula by using film coating technique.

Study on in vitro colon-specific enzymatic degradation performance of carboxymethyl konjac glucomannan;

Release mechanism of metronidazole colon-specific pellets;

Study on the preparation and in vitro drug release of calcium pectinate colon-specific pellets

Study on in vitro release empirical method and the release mechanism of budesonide colonic localization tablet;

The pharmacokinetics study of tinidazole colon-specific enteric-coated tablets in Chinese healthy volunteers;

The pharmacokinetics study of tinidazole colon-specific enteric-coated tablets in healthy volunteers;

Preparation of metronidazole colon-specific enteric-coated tablets and its quality control;

OBJECTIVE To prepare metronidazole colon-specific pellets, and screen formulations according to the profile of release in vitro.

Optimal process of metronidazole colon-targeted sustained-release tablets;