生物等效性
埃索美拉唑
最大值
交叉研究
置信区间
药代动力学
数学
色谱法
药理学
化学
医学
统计
内科学
安慰剂
病理
替代医学
作者
Vani Vegesna,Jing Li,Charles V. Pollack,Sebastian Moreira
出处
期刊:International Journal of Clinical Pharmacology and Therapeutics
[Dustri-Verlag Dr. Karl Feistle]
日期:2018-01-02
卷期号:56 (02): 92-99
被引量:2
摘要
To demonstrate bioequivalence between two esomeprazole formulations under fasted and fed conditions.Esomeprazole 20 mg multiunit pellet system (test; MUPS) tablets and over-the-counter esomeprazole 20 mg banded capsules (reference).This open-label, randomized, 6-period crossover study assigned healthy males and females to receive single doses of each study drug under fasted or fed conditions. The primary pharmacokinetic endpoints were esomeprazole area under the concentration-time curve from time zero to infinity (AUCinf) and maximum observed concentration (Cmax). For endpoints with high within-subject standard deviations of the reference product (Swr ≥ 0.294), a reference scaled average bioequivalence (RSAB) approach was used. For endpoints not highly variable (Swr < 0.294), an unscaled approach was used. In the RSAB, bioequivalence was defined as the 95% criteria bound (CB) ≤ 0 and geometric mean ratios (GMRs) within 0.80, 1.25. For the unscaled approach, bioequivalence was defined as 90% confidence intervals (CIs) of the GMR being within 80%, 125%.60 subjects were randomized, and 46 subjects (76.7%) completed all study periods. For esomeprazole AUCinf, the variability of the reference product was low (Swr = 0.202), so the unscaled approach was used. The GMR (90% CI) was 0.948 (0.890 - 1.010), indicating bioequivalence. For the comparison of esomeprazole Cmax, the variability of the reference product was high (Swr = 0.304), so the RSAB approach was used. The GMR (95% CB) was 1.009 (-0.050), indicating bioequivalence.Esomeprazole 20 mg MUPS tablets and banded capsules were found to be bioequivalent based on the AUCinf and Cmax in the fasted state. .
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