摘要
目的 比较褪黑素缓释片与已上市的褪黑素片在家犬体内的药动学及相对生物利用度。方法 6只家犬随机交叉口服 褪黑素缓释片(制剂A)和市售褪黑素片(制剂B)6mg,采用液相色谱-质谱联用技术测定血浆样品中的药物浓度。结果 制剂 A和制剂B的tmax分别为(2.08±0.20)和(1.13±0.59)h,ρmax分别为(4.66±6.87)和(6.54±6.16)μg·L-1,AUC分别为(13.21± 17.21)和(11.48±5.37)μg·h·L-1。结论 以制剂B为参比,制剂A的相对生物利用度为(87.79±72.68)%。
OBJECTIVE To compare data of pharmacokinetics and bioavailability between sustained release melatonin tablets and commercial tablets. METHODS A single oral dose of 6 mg test or reference preparations was given to 6 healthy dogs in a randomized crossover study. The serum concentrations of melatonin were determined by HPLC-MS method. RESULTS The pharmacokinetic parameters of two kinds of tablets were as follows: tmax(2.08 ±0.20), ( 1.13±0.59) h; ρmax(4.66±6.87), (6.54±6.16)μg·L^-1 ; AUC( 13.21±17.21 ), ( 11.48±5.37)μg·L^-1. CONCLUSION The relative bioavailability of sustained release tablets is( 87.79±72.68 )% compared with the commercial tablets. The two formulations are bioequivalent.
出处
《中国药学杂志》
EI
CAS
CSCD
北大核心
2005年第24期1887-1889,共3页
Chinese Pharmaceutical Journal