两种齐多夫定胶囊在健康人体的药动学和生物利用度比较(英文)

目的：建立灵敏、简便的高效液相色谱法测定血浆齐多夫定药物浓度,并研究2种齐多夫定胶囊(每粒100 mg,300 mg)的健康人体的药动学。方法：18名健康志愿者单剂量交叉口服齐多夫定参比和受试制剂各300 mg,采用高效液相色谱-紫外检测法测定血浆药物浓度。用3P97药动学软件进行药动学参数计算及生物等效性评价。结果：2种齐多夫定胶囊在健康志愿者体内的药-时曲线均符合一室模型,参比制剂、受试制剂的主要药动学参数如下：c_(max)分别为(2 252±s 837)μ·L~(-1)和(2 300±1 099)μg·L~(-1)；t_(max)分别为(0.49±0.19)h和(0.5±0.3)h；t_(1/2ke)分别为(0.93±0.19)h和(0.99±0.24)h；AUC_(0-t)分别为(2 530±452)μg·h·L~(-1)和(2 467±605)μg·h·L~(-1)；AUC_(0-∞)分别为(2 689±414)μg·h·L~(-1)和(2 583±575)μg·h·L~(-1)。2制剂的AUC_(0-t),AUC_(0-∞)和c_(max)对数转换后方差分析和双单侧t检验结果证明2种制剂生物等效。结论：该方法灵敏、便捷、准确、精密,适用于齐多夫定药动学研究；2种齐多夫定胶囊为生物等效制剂。

Pharmacokinetics and bioavailability of two kinds of zidovudine capsules in Chinese healthy volunteers

AIM: To develop a simple and sensitive high-performance liquid chromatography (HPLC) for the quantification of zidovudine and to study the pharmacokinetics of two kinds of zidovudine capsules in Chinese healthy volunteers. METHODS :The concentrations of zidovudine in plasma were determined by a validated HPLC method with UV detection. A randomized two-way crossover study was conducted in 18 fasting volunteers to compare plasma pharmacokinetic profile and single-dose tolerability of a new zidovudine capsules. RESULTS: The main pharmacokinetic parameters of two formulations, reference and test capsules, were as follows: cmax were (2 252±s 837) μg·L-1 and (2 300±1 099) μg·L-1; tmax were (0.49±0.19) h and (0.5±0.3) h;t1/2 ke were (0.93±0.19) h and (0.99±0.24) h; AUC0-t were (2 530±452) μg·h·L-1 and (2 467±605) μg·h·L-1;AUC0-∞ were(2 689 ± 414) μg·h·L-1 and (2 583±575) μg·h·L-1. The results of ANOVA and two one-side t test statistical analysis for lg AUC0-t, lg AUC0-∞ and lg cmax showed that two formulations were bioequivalent. CONCLUSION:The method is convenient, sensitive, accurate and reproducible, and could be applied to determining the plasma zidovudine concentration and studying on pharmacokinetics. Two zidovudine capsules are bioequivalent in Chinese healthy volunteers.