Gabapentin quantification in human plasma by high-performance liquid chromatography coupled to electrospray tandem mass spectrometry. Application to bioequivalence study

被引:52
|
作者
Ifa, DR
Falci, M
Moraes, ME
Bezerra, FAF
Moraes, MO
de Nucci, G
机构
[1] Univ Sao Paulo, Cartesius Analyt Unit, Dept Pharmacol, ICB, BR-05508900 Sao Paulo, Brazil
[2] Fed Univ Ceara, Dept Pharmacol, BR-60431970 Ceara, Brazil
来源
JOURNAL OF MASS SPECTROMETRY | 2001年 / 36卷 / 02期
关键词
gabapentin; human plasma; chromatography; mass spectrometry;
D O I
10.1002/jms.120
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A rapid, sensitive and specific analytical method was developed and validated to quantify gabapentin in human plasma using acetaminophen as an internal standard. The method employs a single plasma protein precipitation. The analytes are chromatographed on a C-4 reversed-phase chromatographic column and analyzed by mass spectrometry in the multiple reaction monitoring (MRM) mode. The method has a chromatographic run time of 4 min and a linear calibration curve over the range 50-10000 ng ml(-1) (I. > 0.999). The between-run precision, based on the relative standard deviation for replicate quality controls, was less than or equal to 14.8 % (200 ng ml(-1)), 6.0% (1000 ng ml(-l)) and 4.4% (5000 ng ml-l). The between-run accuracy was +/-2.6, 4.4 and 0.5% for the above-mentioned concentrations, respectively. This method was employed in a bioequivalence study of two gabentin capsule formulations (Progresse from Biosintetica, Brazil, as a test formulation, and Neurotin from Parke-Davis, as a reference formulation) in 24 healthy volunteers of both sexes who received a single 300 mg dose of each formulation. The study was conducted using an open, randomized, two-period crossover design with a 7-day washout interval. The 90% confidence interval (CI) of the individual ratio geometric mean for Progresse/Neurotin was 87.9-115.6% for AUC((0-36) (h)) and 88.6-111.7% for C-max. Since both 90% CI for AUC((0-36 h)) and C-max were included in the 80-125% interval proposed by the US Food and Drug Administration, Progresse was considered bioequivalent to Neurotin according to both the rate and extent of absorption. Copyright (C) 2001 John Wiley & Sons, Ltd.
引用
收藏
页码:188 / 194
页数:7
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