title: Simultaneous determination of albendazole and its major active metabolite in human plasma using a sensitive and specific liquid chromatographic-tandem mass spectrometric method.
abstract: A method for the simultaneous determination of albendazole (ABZ) and its major active metabolite albendazole sulfoxide (ABZ-SO) was developed and validated. The analytes were extracted from plasma samples by liquid-liquid extraction and analyzed using liquid chromatography-tandem mass spectrometry with an electrospray ionization interface. Estazolam was used as the internal standard. The assay was linear in the concentration range 0.4-200 ng/ml for ABZ and 4.0-2000 ng/ml for ABZ-SO. The intra- and inter-run precision (R.S.D.), calculated from quality control (QC) samples was less than 7.1 and 9.4% for ABZ and ABZ-SO, respectively. The accuracy as determined from QC samples was within +/- 3% for the analytes. Recoveries of ABZ and ABZ-SO were greater than 77 and 53%, respectively, over the calibration curve range. The method developed was successfully applied to pharmacokinetic studies of ABZ and ABZ-SO after an oral dose of 400 mg albendazole to healthy volunteers.
authors.affiliation: Laboratory of Drug Metabolism and Pharmacokinetics, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Chen
authors.forename: Liyan
authors.initials: L
authors.lastname: Zhao
authors.forename: Haiyan
authors.initials: H
authors.lastname: Xu
authors.forename: Dafang
authors.initials: D
authors.lastname: Zhong
mesh_terms: D015766:Albendazole / Q000097:blood* / Q000737:chemistry / Q000378:metabolism*; D002853:Chromatography, Liquid / Q000379:methods; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods
chemical_list: D015766:Albendazole