摘要
目的:建立测定多沙唑嗪血浆药物浓度的HPLC-MS/MS检测法,研究甲磺酸多沙唑嗪缓释片在人体的药动学及评价其生物等效性。方法:20例男性健康志愿者,分别单次和多次交叉口服试验制剂或参比制剂4 mg,采用HPLC-MS/MS法测定给药后不同时间点血浆中多沙唑嗪经时血药浓度,采用DAS 2.1.1计算其药动学参数,考察其生物等效性。结果:单次口服4 mg甲磺酸多沙唑嗪缓释片主要药动学参数如下:试验制剂(T)与参比制剂(R)的Cmax分别为(7.44±1.99),(7.47±2.62)ng·mL^-1;Tmax分别为(16.84±5.86),(18.53±5.37)h;AUC0~84分别为(252.11±73.10),(249.39±83.66)ng·h·mL^-1;以AUC0~84计算试验制剂相对参比制剂生物利用度为(105.0±25.7)%;多次用药后主要药动学参数如下:试验制剂(T)与参比制剂(R)的Css-max分别为(13.40±4.61),(13.20±5.36)ng·mL^-1;AUCss分别为(257.00±83.61),(254.69±92.50)ng·h·mL^-1;DF分别为(50.70±17.07)%,(46.51±18.42)%。试验制剂相对参比制剂生物利用度为(103.0±18.5)%。结论:参数经自然对数转换后进行方差分析、双单侧t检验及计算90%的可信区间,等效性检验结果表明试验制剂和参比制剂生物等效。
Objective: To develop a validated HPLC-MS /MS method for determining doxazosin in human plasma,and to investigate the pharmacokinetic profiles and bioequivalence of doxazosin mesylate extended-release tablets. Methods: A single oral dose( 4 mg) and multi-oral dose of test and reference doxazosin mesylate extended-release tablets were given to 20 healthy male volunteers in an open randomized cross-over study. Doxazosin concentrations in plasma were measured by an HPLC-MS / MS method. The pharmacokinetic parameters as well as relative bioavailability were determined. Results: The concentration-time curves of doxazosin were described by a onecompartment open model. The main pharmacokinetic parameters of doxazosin test and reference preparations after a single dose were as follows: Cmax,( 7. 44 ± 1. 99) and( 7. 47 ± 2. 62) ng·m L^-1; Tmax,( 16. 84 ± 5. 86) and( 18. 53 ± 5. 37) h; AUC0 ~ 84,( 252. 11 ± 73. 10) and( 249. 39 ± 83. 66) ng·h·m L^-1,respectively. The relative bioavailability of doxazosin was( 105. 0 ± 25. 7) %. The main pharmacokinetic parameters of doxazosin test and reference preparations after the multi-dose were as follows: Css-max,( 13. 40 ± 4. 61) and( 13. 20 ± 5. 36) ng·m L^-1;AUCss( 257. 00 ± 83. 61) and( 254. 69 ± 92. 50) ng·h·mL^-1; DF( 50. 70 ± 17. 07) % and( 46. 51 ± 18. 42) %,respectively. The relative bioavailability of doxazosin was( 103. 0 ± 18. 5) %. Conclusion: Statistical analysisshows that the two formulations are bioequivalent.
出处
《中国新药杂志》
CAS
CSCD
北大核心
2015年第2期177-181,共5页
Chinese Journal of New Drugs