替米沙坦在中国健康人体内的药代动力学和相对生物利用度研究

目的:研究替米沙坦在中国人体内的药代动力学和相对生物利用度。方法:2 0名男性健康志愿者单剂量随机交叉口服80mg国产替米沙坦胶囊(试验片)和进口替米沙坦片(参比片) ,采用HPLC 荧光检测法测定受试者96h的血药浓度,生物等效性采用双侧t检验。结果:国产和进口的替米沙坦血药浓度 时间曲线符合二室开放模型,其主要药代动力学参数:Cmax分别为4 5 6 .2 8±2 5 2 .5 6和75 9.5 4±313.5 4μg·L- 1,Tmax分别为1.6 1±0 .71和1.0 8±0 .36h ,T1/ 2 β分别为2 2 .39±6 .2 9和2 1.0 8±5 .2 4 ,MRT分别为2 7.0 2±6 .2 3和2 4 .2 7±5 .79h ,AUC0 -t分别为345 4±10 5 0和36 36±130 0 μg·h·L- 1,统计分析,试验片与参比片的Cmax、Tmax有统计学差异(P <0 .0 5 ) ,而AUC0 -t没有显著性差异(P >0 .0 5 ) ,试验片相对生物利用度为97.2 8%±12 .74 %。结论:国产替米沙坦胶囊和进口片剂具有生物等效性。

Pharmacokinetics and relative bioavailability of telmisartan in male healthy Chinese volunteers

AIM: To compare pharmacokinetics and relative bioavailability of telmisartan capsule (T) and telmisartan tablet(R). METHODS: 20 male healthy Chinese volunteers were enrolled in a randomized two-way crossover designs with a single-oral dose study(80 mg once per day for each preparation). The plasma telmisatan concentration was determined by HPLC- fluorescence detector. Plasma levels of telmisatan were followed up to 96 h. Area under the telmisartan concentration time curve was calculated by variance analysis and the bioequivalent was determined by two one-side t-test. RESULTS: A two-compartment model was adopted in telmisartan plasma concentration-time data analysis. The pharmacokinetic parameters of T and R in single-dose study including Cmax (μg·L-1), Tmax (h), T1/2β (h), MRT(h), AUC0-92(μg·h·L-1) were as following: 456±253 and 760±314, 1.61±0.71 and 1.08±0.36, 22.39±6.29 and 21.08±5.24, 27.02±6.23 and 24.27±5.79, 3454±1050 and 3635±1300, respectively. Statistically significant differences were observed between the parameter values of the two products in Cmax and Tmax; whereas there was no statistically significant difference between AUC0-∞μg·h·L-1 (3601±1095 and 3767±1399). The relative bioavailability for T was 97.28%±12.74%. CONCLUSION: The test telmisartan capsule is bioequivalent to the reference tablet.