期刊论文

Tang, Y.

中文

中国中药杂志

1001-5302

2009

34

14

1795-1798

10.3321/j.issn:1001-5302.2009.14.011

本校为第一机构

目的:探讨石杉碱甲胃膨胀片的释药机制及影响因素.方法:以PEO为骨架材料,PVA为助膨剂,MCC为填充剂,运用Ritger-Peppas方程释放指数n值,评价PEO,PVA,MCC等对释药速率的影响.结果:胃膨胀片的释药速率随PEO,PVA含量增高而变快,而MCC对释药速率没有明显影响.经处方筛选优化后制备的膨胀片,药物释放曲线符合Higuechi方程,释药机制是扩散和凝胶骨架溶蚀2种机制的协同作用结果的非Fick扩散.结论:PEO,PVA均可影响法石杉碱甲胃膨胀片中主药的释放,而MCC影响不明显.药物释药机制用Ritger-Peppas方程进行描述后,结论是释药机制符合非Fick扩散.

OBJECTIVE: To study the release mechanism of Huperzine-A swelling sustained-release tablets (HA-ST) and the factors influencing the release rate. METHOD: The HA-ST were prepared by using Polyoxyethylene (PEO) as the matrix material, polyvinyl alcohol (PVA) as the expandable reagent and microcrystalline cellulose (MCC) as the filling reagent. The effect of the amount of PEO, PVA and MCC on the drug release from the tablets was evaluated using the release index n value of the Ritger-Peppas equation. RESULT: The addition of PEO and PVA speeded up the rate of drug release from the tablets, while M...