盐酸尼卡地平缓释微丸的制备

目的 制备盐酸尼卡地平缓释微丸,并考察其体外释药的影响因素.方法 采用底喷式流化床包衣法,以空白丸芯为基础制备速释微丸,乙基纤维素水分散体为包衣材料制备盐酸尼卡地平缓释微丸,考察其包衣处方及工艺的影响因素.结果 所得缓释微丸在2、6、12h的累积释药百分率分别为24％、69％、87％,体外释放曲线符合一级方程.结论 制备的微丸缓释效果理想,且制备工艺简单,操作方便.

Preparation of nicardipine hydrochloride sustained-release pellets

Objective To prepare nicardipine hydrochloride sustained-release pellets and investigate the influencing factors of the drug release in vitro. Methods The rapid-release pellets were prepared by fluidized bed coating method based on blank pill core and then nicardipine hydrochloride sustained-release pellets were prepared with surelease. The factors to influence the drug release behaviors and their properties were evaluated. Results The release percentage of the sustained-release pellets could be controlled by 24%, 69%, 87% at 2 h, 6 h, 12 h respectively, the drug release mechanism in vitro followed first-order equations.Conclusion The pellets showed an obviously sustained-release effect.The preparation process was simple and convenient.