【摘要】 目的 :研究萘哌地尔缓释胶囊的体外释放与其在家犬体内吸收的相关性 ,考察体外释放条件设计的合理性。方法 :以人工胃液为溶出介质 ,测定两种萘哌地尔缓释胶囊的体外释放度 ;单剂量给予家犬萘哌地尔缓释胶囊200mg 后测定血药浓度变化 ,用3p97药动学程序对萘哌地尔体内过程进行拟合 ,根据拟合结果计算不同时间点萘哌地尔缓释胶囊在家犬体内的吸收分数 ;以反卷积分法求算积分方程中的输入函数。以体内吸收分数或输入函数与同时间点体外累积释放度回归 ,求得相关系数并与相关系数临界值进行比较。结果 :采用模型拟合计算的吸收分数法、反卷积分法计算所得的两种萘哌地尔缓释胶囊的体外释放与体内吸收回归的相关系数均大于相关系数临界值 ,制剂的体外释放与体内吸收的相关性良好。结论 :模型拟合计算吸收分数与反卷积分法用于萘哌地尔缓释胶囊体内外相关性研究 ,方法简单可行。研究结果为萘哌地尔缓释制剂的快速处方筛选、体外释放条件的合理设计及缓释制剂的快速评价提供了理论依据更多还原

【Abstract】 OBJECTIVE:To study the in vitro-in vivo correlation of sustained-release naftopidil capsule,review the rationality of the designed dissolution conditions METHODS:Artificial gastric juice was selected as the dissolution medium,the dissolution rate of the two naftopidil sustained-release capsules were studied;the 3p97 pharmacokinetic program was used to characterize the in vivo course of the sustained-release capsules after giving dogs a oral single dose of 200mg,after this,the percentage absorbed at different time were calculated The input functions were obtained by using deconvolution technique Then the correlation coefficients of the calibration graph by plotting the dissolution rate to the percentage absorbed or the input functions were calculated The in vitro-in vivo correlations of sustained-release naftopidil capsules were studied by comparing the correlation coefficients calculated to the critical correlation coefficients RESULTS:The correlation coefficients calculated by the two methods were both more than the critical coefficients,the in vitro-in vivo correlations of the two sustained-release naftopidil capsules were good CONCLUSION:The two methods mentioned in this paper to study the in vitro-in vivo correlation were simple and reliable,the results of this study were very useful in the rapid formulation screening,the designing of rational dissolution rate conditions,and the providing theory basic of evaluation of the naftopidil sustained-release capsules更多还原