贝诺酯缓释骨架片释药速率影响因素实验研究

Influence factors of the release rate of benorilate from sustained-release matrix tablets

目的 研究贝诺酯缓释骨架片体外释药速率的影响因素。方法 以羟丙基甲基纤维素 (HPMC)为骨架材料制备贝诺酯缓释骨架片 ,利用Peppas经验式释放指数n值 ,评价HPMC、PVP、MCC用量及制片工艺对贝诺酯缓释骨架片体外制释药速率的影响。结果 释药速率随HPMC含量增高而减慢 ,PVP、MCC的加入均加快贝诺酯释药速率 ,干法制片的释药比湿法快。结论 HPMC、PVP、MCC的用量对释药速率有影响 ,HPMC用量的影响较大 。

Objective To study the influence factors of the release rate of benorilate from sustained release matrix tablets. Methods The matrix tablets of benorilate were prepared by using hydroxypropylmethylcellulose (HPMC) as the matrix material. The effects of the contents of HPMC, polyvinyl pyrrolidone (PVP), and microcrystaline cellulose (MCC), and the method of preparation on in vitro drug release were studied by evaluating the n value in the Peppas equation. Results The increasing HPMC content led to decrease of benorilate release. However, PVP and MCC used in this experiment accelerated the benorilate release from the tablets. The drug released from the tablet prepared by dry method was faster than that by wet method. Conclusion The contents of HPMC, PVP, and MCC, especially HPMC, have effects on the release rate of benorilate, but the two preparation methods have less effect.