摘要
目的建立测定人血浆中美托洛尔浓度的液相色谱-串联质谱(LC—MS/MS)法,研究健康受试者单剂量和多剂量口服美托洛尔受试制剂和参比制剂后的药动学和生物等效性。方法40名男性健康志愿者进行随机双交叉试验,分别单剂量和多剂量口服美托洛尔受试制剂和参比制剂100 mg,采用LC—MS/ MS法测定血药浓度,用DAS软件计算主要药动学参数。结果单剂量时受试制剂和参比制剂的主要药动学参数如下:c_(max)分别为(144±s 43)和(164±40)μg·L^(-1),t_(max)分别为(3.7±1.2)和(3.5±0.8)h,t_(1/2)分别为(6.0±2.5)和(4.9±2.0)h,AUC_(0~24)分别为(1 639±787)和(1 658±636)μg·h·L^(-1),相对生物利用度为(97±21)%。多剂量达稳态时受试制剂和参比制剂的主要药动学参数如下:c_(max)分别为(241±170)和(232±75)μg·L^(-1),c_(min)分别为(115±66)和(121±64)μg·L^(-1),t_(max)分别为(3.7±1.0)和(3.5±1.6)h,AUC_(ss)分别为(1 905±882)和(1 992±834)μg·h·L^(-1),c_(av)分别为(159±73)和(166±69)μg·L^(-1),DF分别为(77±30)%和(75±31)%。受试制剂与参比制剂的AUC_(0~t),AUC_(0~∞)或AUC_(ss),c_(max)和t_(max)均符合生物等效性要求。结论建立的LC—MS/MS法专属、准确、灵敏度适宜。测定的美托洛尔受试制剂和参比制剂生物等效。
AIM To establish a LC-MS/MS method for the study of the pharmacokinetics and bioequivalence of metoprolol sustained release tablets in healthy male Chinese volunteers. METHODS A single or multiple oral dose of 100 mg metoprolol sustained released tablets or reference was given to each volunteer according to an open randomized crossover study in 20 health males. The concentrations of metoprolol and reference preparations in plasma were determined by LC-MS/MS method and the pharmacokinetics parameters together with relative bioavailability were calculated with DAS program to evaluate each of the two preparations. RESULTS The main parameters of the tested and reference metoprolol after a single dose were as follows: cmax (144 ± s 43) and (164 ± 40) μg· L^-1, tmax (3.7 ± 1.2) and (3.5 ± 0.8) h, t1/2 (6.0 ± 2.5) and (4.9 ± 2.0) h, AU C0-24 (1 639 ± 787) and (1 658 ±636) μg· L^-1, respectively. The relative bioavailability was (97± 21) %. The main parameters of the tested and reference metoprolol after multiple doses were as follows: cmax (241 ± 170) and (232 ±75) μg· L^-1, Cmin (115± 66) and (121± 64) μg· L^-1, tmax (3.7 ± 1.0) and (3.5 ± 1.6) h, AUCss (1 905 ± 882) and (1 992 ± 834)μg· L^-1, Cav (159 ± 73) and (166± 69) μg· L^-1, DF (77 ± 30) % and (75 ± 31) %, respectively. The AUC0-t, AUC0-∞ or AUCss, cmax and tmax of the two preparations were bioequivalent. CONCLUSION The LC-MS/MS method is specific and sensitive. The tested and reference metoprolol sustained released tablet are bioequivalent.
出处
《中国新药与临床杂志》
CAS
CSCD
北大核心
2008年第6期429-433,共5页
Chinese Journal of New Drugs and Clinical Remedies
关键词
美托洛尔
迟效制剂
药动学
色谱法
高压液相
光谱法
质量
电喷雾电离
生物等效性
metoprolol
delayed-action preparation
pharmacokinetics
chromatography, high pressure liquid
spectrometry, mass, electrospray ionization
bioequivalence