体外条件对不同类型灯盏花素缓控释制剂释放行为的影响

灯盏花素是从灯盏花中提取的黄酮类活性成分,包括灯盏乙素和灯盏甲素.灯盏乙素是其主要活性成分,在临床上被广泛用于治疗脑血管栓塞等症及心血管疾病等1].随着中药现代化的兴起,将服用次数多、生物利用度低的灯盏花素普通制剂开发成新制剂已成为热点.以渗透泵和凝胶骨架技术为代表的缓控释制剂以其安全、顺应性好等优点发展快速.

Effects of in vitro conditions on release behavior of different types of sustained and controlled release formulations of breviscapin

Insoluble breviscapin was chosen as the model drug. Bi-layer osmotic pump technology and gel matrix technology were used to prepare the breviscapin sustained and controlled release preparations. Dissimilarity factors (f₁) and similarity factors (f₂) were applied as similar judgment index to compare the effects of in vitro conditions on the release behavior of different types of breviscapin sustained and controlled release preparations. The tolerance of in vitro release conditions of bi-layer osmotic pump technology and gel matrix technology were studied. The results showed that in vitro release conditions have a greater impact on the gel matrix sustained release formulations, while have almost no effects on the osmotic pump controlled release formulations. Therefore, osmotic pump controlled release technology is less affected by the drug release environment. And it has a very good application prospect.