进食对氯沙坦药动学的影响研究

目的:研究进食对健康受试者单剂量口服氯沙坦钾片药动学的影响。方法:10名健康受试者随机分为2组,每组5人。试验开始前一晚禁食10h,晨起后,一组空腹口服氯沙坦钾片50mg,另一组在进食后口服氯沙坦钾片50mg。经1周清洗期后,两组交叉试验。采用高效液相色谱串联质谱电喷雾(HPLC-MS/MS)法测定人血浆中氯沙坦及其代谢产物E-3174的浓度,采用DAS2.1.1软件计算药动学参数并比较进食或空腹对药动学的影响。结果:空腹和进食后服用氯沙坦钾片,血浆原型药物tmax分别为(1.33±0.60)、(2.20±1.09)h,cmax分别为(268.51±192.39)、(138.11±32.84)μg.L-1,AUC0～12分别为(442.83±171.05)、(401.54±98.43)μg.h.L-1,t1/2z分别为(1.59±0.22)、(1.74±0.59)h,MRT0～12分别为(2.74±0.69)、(3.57±0.91)h;代谢产物E-3174的cmax分别为(890.6±239.13)、(904.9±415.88)μg.L-1,tmax分别为(4.60±1.58)、(5.00±1.41)h,AUC0～36分别为(6407.54±1243.00)、(6417.02±2472.92)μg.h.L-1,t1/2z分别为(5.25±3.46)、(4.64±1.46)h,MRT0～36分别为(8.34±1.52)、(8.95±1.24)h。上述药动学参数差异经t检验无统计学意义(P>0.05)。结论:空腹和进食后服用氯沙坦钾片,原型药物和起主要降压作用的代谢产物E-3174的各药动学参数无显著性差异,可认为进食对本药在健康人体内的代谢无影响。

Effect of Dining on the Pharmacokinetics of Losartan

OBJECTIVE:To investigate the effect of dining on the pharmacokinetics of losartan in healthy volunteer after single oral dose of Losartan potassium tablets.METHODS:10 healthy volunteers were randomly divided into 2 groups with each group of 5 persons.One group received 50 mg Losartan potassium tablet at once after fasting 10 hours.Another group received 50 mg Losartan potassium tablet at once after dinner.Cross randomized test was designed after 1 week cleaning.The plasma concentrations of losartan and its ...