淫羊藿组分缓释制剂的研究

筛选淫羊藿组分缓释片的处方,建立体外释放评价方程.采用胶态二氧化硅辅助喷雾干燥淫羊藿组分,并以其为主药制备缓释片.以主要成分宝藿苷Ⅰ的溶出度为评价指标考察骨架材料类型、填充剂、致孔剂、润滑剂等辅料对缓释片质量的影响,并采用干法压片工艺制备出淫羊藿组分缓释片.所筛选的缓释片处方为主药35％,羧甲基纤维素HPMC K4M20％和HPMC K15M10％为骨架材料,微晶纤维素31％,PEG6000 2％,硬脂酸镁2％.该处方条件下制备的淫羊藿组分缓释片体外持续8h释药达80％.零级方程、一级方程及Higuchi方程等都能较好模拟缓释片体外释放特征,其相关系数r均大于0.96.其中一级方程与体外释放特征最相似,其相关系数r为0.995 0.该制备方法操作简单,处方筛选结果真实可靠,可为淫羊藿组分缓释制剂的生产制备提供思路和方法指导.

Study on sustained release preparations of Epimedium component

The formulation for sustained release tablet of Epimedium component was selected and the evaluation equation of in vitro release was established. The liquidity of component was improved with the help of colloidal silica aided by spray drying, which would be the main drug in the sustained release tablets. Dissolution was selected as an evaluation index to investigate skeletal material type, fillers, impact porogen, lubricants and other materials on the quality of sustained release tablet. The sustained release tablets were prepared by dry compression. Formulation of sustained release preparations was main drug 35%, HPMC K_4M 20% and HPMC K_15M 10% as skeleton material, MCC 31% as filler, PEG6000 2% as porogen and magnesium stearate 2% as lubricant. The sustained release tablets released up to 80% in 8 h. The zero order equation, primary equation and Higuchi equation could simulate the release characteristics of sustained release tablets in vitro, the correlation coefficients r were larger than 0.96. The primary equation was most similar in vitro release characteristics and its correlation coefficient r was 0.995 0. The preparation method is simple and the results of formulation selection are reliable. It can be used to guide the production of Epimedium component sustained release preparations.