title: Simultaneous quantification of alprazolam, 4- and alpha-hydroxyalprazolam in plasma samples using liquid chromatography mass spectrometry.
abstract: A sensitive and specific method was developed for quantification of alprazolam and its two metabolites 4-hydroxyalprazolam and alpha-hydroxyalprazolam in plasma. The work up procedure was solid phase extraction. Liquid chromatography-mass spectrometry (LC-MS) was used for separation, detection and quantification of the analytes. The limit of quantitation (LOQ) was 0.05 ng/mL for alprazolam and the two metabolites. The extraction recovery was more than 82% for alprazolam and its metabolites. The within- and between-assay coefficients of variation were in the range of 1.9-17.9%. The method was used for determination of the pharmacokinetics parameters of alprazolam and its two metabolites in healthy Caucasian subjects who ingested 1mg of alprazolam.
authors.affiliation: Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institutet at Karolinska University Hospital, Huddinge, S-141 86 Stockholm, Sweden.
authors.forename: Annika
authors.initials: A
authors.lastname: Allqvist
authors.forename: Agneta
authors.initials: A
authors.lastname: Wennerholm
authors.forename: Jan-Olof
authors.initials: JO
authors.lastname: Svensson
authors.forename: Rajaa A
authors.initials: RA
authors.lastname: Mirghani
mesh_terms: D000525:Alprazolam / Q000031:analogs & derivatives* / Q000097:blood* / Q000493:pharmacokinetics; D014151:Anti-Anxiety Agents / Q000097:blood* / Q000493:pharmacokinetics; D006801:Humans; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D014151:Anti-Anxiety Agents; C032318:alpha-hydroxyalprazolam; D000525:Alprazolam