机构地区:[1]中国药科大学药物分析室,南京210009 [2]南京医科大学临床药理研究所,南京210029
出 处:《药物分析杂志》2007年第4期486-489,共4页Chinese Journal of Pharmaceutical Analysis
摘 要:目的:建立同时测定人血浆中对乙酰氨基酚、水杨酸和咖啡因浓度的高效液相色谱法,研究健康受试者口服氨酚匹林咖啡因片(每片含对乙酰氨基酚250mg、阿司匹林250mg、咖啡因65mg)后的人体药代动力学和生物等效性。方法:20名健康受试者单剂量交叉口服等剂量的氨酚匹林咖啡因受试片和参比片各2片后,0~24h内间隔取血,分离血浆,以对氨基苯甲酸为内标、经乙酸乙酯提取富集后,在苯基柱上以甲醇-pH5.2醋酸盐缓冲液(25∶75)为流动相分离,237nm检测,测定血浆样品药时过程,计算主要药代动力学参数,评价生物等效性。结果:口服受试和参比片后,对乙酰氨基酚的主要药动学参数C_(max),T_(max),t_(1/2)(λ_Z),MRT和AUC_(0~24)分别为(9.02±1.55)和(8.25±2.33)μg·mL^(-1),(0.70±0.20)和(0.70±0.20)h,(4.01±0.49)和(3.81±0.76)h,(4.81±0.52)和(4.86±0.86)h,(31.54±4.79)和(30.39±5.88)h·μg·mL^(-1);水杨酸(阿司匹林活性代谢物)的主要药动学参数分别为(42.60±9.20)和(32.74±7.83)μg·mL^(-1),(1.20±0.50)和(3.0±1.4)h,(2.95±0.73)和(2.87±0.55)h,(5.52±0.91)和(6.17±1.00)h,(254.82±58.90)和(244.93±56.80)h·μg·mL^(-1);咖啡因的主要药动学参数分别为(3.80±0.60)和(3.93±1.09)μg·mL^(-1),(0.90±0.30)和(0.90±0.60)h,(7.23±3.41)和(6.16±3.07)h,(9.49±3.60)和(8.76±3.77)h,(23.43±5.65)和(25.24±7.51)h·μg·mL^(-1)。由AUC_(0~24)估算,氨酚匹林咖啡因片受试制剂的对乙酰氨基酚、水杨酸、咖啡因的相对生物利用度分别为(107.5±28.0)%,(109.2±39.4)%,(99.2±40.0)%。结论:血浆样品中对乙酰氨基酚、水杨酸和咖啡因浓度的HPLC同时测定法专属性强,灵敏度适宜。药代动力学结果表明受试和参比制剂生物等效。Objective: To develop an HPLC method for simultaneous determination of paracetamol, salicylic acid and caffeine in human plasma and to investigate the pharmacokinetics and bioequivalence of test and reference paracetamol, aspirin and caffeine tablets in human, nethod:A randomized crossover design was performed in 20 healthy volunteers. Plasma samples treated with ethyl acetate extraction were separated on a phenyl column with a mobile phase of methanol - ammonium acetate buffer (25: 75 ) and detected at 237 nm. Results: The main pharmacokinetic parameters of Cmax, Tmax ,t1/2 (λz), MRT and AUC0-24 after po two test or reference paracetamol, aspirin and caffeine tablets for paracetamol were ( 9. 02 ± 1.55 ) and ( 8.25 ± 2. 33 )μg·mL^-1, (0. 70 ± 0. 20 ) and (0. 70 ±0. 20)h, (4. 01 ±0. 49) and (3.81 ±0. 76)h, (4.81 ±0. 52) and (4. 86 ±0. 86)h, (31.54 ±4. 79) and (30. 39 ±5.88)h ·μg·mL^-1 ,respectively;for salicylic acid (active metabolite of aspirin) were (42. 60 ±9. 20) and (32.74±7.83)μg·mL^-1,(1.20±0.50) and (3.0±1.4) h,(2.95±0.73) and (2.87±0.55) h, (5.52 ± 0. 91 ) and (6. 17 ± 1.00) h, (254. 82 ± 58.90 ) and (244. 93 ± 56. 80 ) h·μg·mL^-1, respectively; for caffeine were (3.80 ±0.60) and (3.93 ±1.09)μg·mL^-1, (0.90 ±0.30) and (0.90±0.60)h,(7.23 ± 3.41) and (6. 16 ±3.07)h,(9.49 ±3.60) and (8.76 ±3.77)h,(23.43 ±5.65) and (25.24 ±7.51)h·μg·mL^-1 ,respectively. The relative bioavailability of the test tablets were ( 107.5 ± 28.0)%, ( 109.2 ± 39.4)%, (99.2 ± 40. 0) % for paracetamol, salicylic acid and caffeine, respectively. The results of ANOVA and two one - sided t- test showed that there was no significant difference between the two formulations in the AUC0-24 and Cmax. Conclusion:The HPLC method is proved to be selective and sensitive. The two formulations are bioequivalent.
关 键 词:对乙酰氨基酚 阿司匹林 水杨酸 咖啡因 药代动力学 高效液相色谱
分 类 号:R917[医药卫生—药物分析学]
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