HPLC-MS法评价2种茴拉西坦胶囊的人体生物等效性

目的建立HPLC-MS法测定人血浆中茴拉西坦的活性代谢物对甲氧基苯甲酰氨基丁酸(ABA)的浓度,比较2种茴拉西坦胶囊的人体生物等效性。方法 24名健康男性志愿者单剂量交叉口服受试制剂或参比制剂200 mg,采用HPLC-MS法测定血浆中不同时间点茴拉西坦代谢物ABA的血药浓度,计算主要药代动力学参数及相对生物利用度,评价2种制剂的生物等效性。结果受试制剂和参比制剂的主要药动学参数:Cmax分别为(9.30±5.13)和(8.70±3.17)μg/ml;tmax分别为(38.41±17.89)和(39.09±19.92)min;t1/2分别为(37.21±10.51)和(38.45±9.24)min;AUC0-t分别为(555.21±157.10)和(545.39±97.22)μg/(ml.min);AUC0-∞分别为(566.24±158.01)和(554.71±100.32)μg/(ml.min)。以AUC0-t和AUC0-∞计算,受试制剂的相对生物利用度F0-t和F0-∞分别为(101.22±17.17)%和(101.52±16.63)%。2种制剂的主要药代动力学参数差异无统计学意义。结论 2种茴拉西坦胶囊具有生物等效性。

HPLC-MS in evaluating bioequivalence of two kinds of aniracetam capsules in healthy volunteers

Objective To establish a HPLC-MS method for determinating the concentration of 4-p-anisamidobutyric acid(ABA),the main active metabolite of aniracetam capsules in the plasma,and to compare the bioequivalence of two aniracetam capsules in healthy volunteers.Methods Twenty-four healthy male volunteers were randomly given an oral single dose of 200 mg test or reference aniracetam capsules in a crossover manner.The concentrations of ABA were assayed by HPLC-MS at different time points.The main pharmacokinetic p...