The 50% effective doses of five barbiturate-β-cyclodextrin complexes on oral administration to mice were compared with those of the corresponding barbiturates. In all cases tested, the complex gave a smaller ED50 than the intact drug. ED50 of phenobarbital, which forms the most stable complex and consequently shows the greatest enhancement in solubility, was reduced most markedly by complexation. With the exception of barbital, sleeping lag (the time from oral administration to loss of righting reflex) on administration of the complex to mice was shorter than that on giving an equimolar amount of the intact drug (p<0.001), and sleeping time (the time from loss to recovery of righting reflex) was significantly increased by inclusion complexation with β-cyclodextrin.
将5种
巴比妥类-β-
环糊精复合物对小鼠口服的50%有效剂量与相应的
巴比妥类药物进行了比较。在所有测试案例中,复合物的ED50均小于完整药物。
苯巴比妥的ED50形成最稳定的复合物,因此显示出最大的溶解度增强,其复合物化作用最为明显。除了
巴比妥类药物外,复合物对小鼠的睡眠滞后(从口服到丧失直立反射的时间)比等摩尔量的完整药物更短(p<0.001),而与β-
环糊精的包合复合物则显著延长了睡眠时间(从丧失到恢复直立反射的时间)。