Due to the interaction with the drug, the release rate ofthe systems including polyvinylpyrrolidone(PVP) was slower .

• 聚乙烯吡咯烷酮(PVP)的加入,增加了凝胶体系的网络交联密度,且对药物具有很好的络合作用,因而含PVP体系药物缓释效果要好。