title: Validation of a simple liquid chromatography-tandem mass spectrometric method for the determination of propiverine hydrochloride and its N-oxide metabolite in human plasma.
abstract: A simple high-performance liquid chromatography (HPLC)-tandem mass spectrometric method has been developed for determination of propiverine hydrochloride and its metabolite, propiverine N-oxide (M-1) in human plasma using stable isotopes, propiverine hydrochloride-d10 and M-1-d10, as internal standards. The analytes were extracted with dichloromethane from 0.2 ml of plasma in neutral condition (pH 7.0) and separated by HPLC on a C18 reversed-phase column using methanol-1% acetic acid (50:50) as a mobile phase, and detected using positive electrospray ionization in selected reaction monitoring (SRM) mode. The method was validated over a concentration range of 2-500 ng/ml for propiverine hydrochloride and 4-1000 ng/ml for M-1 using 0.2 ml of human plasma per assay. The method developed was successfully applied to analysis of propiverine hydrochloride and M-1 in clinical studies.
authors.affiliation: Pharmacokinetics Research Laboratory, Taiho Pharmaceutical Co. Ltd., 224-2, Ebisuno, Hiraishi, Kawauchi-cho, Tokushima 771-0194, Japan. i-komoto@taiho.co.jp
authors.forename: Ikumi
authors.initials: I
authors.lastname: Komoto
authors.forename: Ken-ichiro
authors.initials: K
authors.lastname: Yoshida
authors.forename: Eiji
authors.initials: E
authors.lastname: Matsushima
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Yamashita
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Aikawa
authors.forename: Shunji
authors.initials: S
authors.lastname: Akashi
mesh_terms: D001561:Benzilates / Q000097:blood* / Q000493:pharmacokinetics; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D010276:Parasympatholytics / Q000097:blood* / Q000493:pharmacokinetics; D012015:Reference Standards; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D001561:Benzilates; D010276:Parasympatholytics; C015586:propiverine