title: Highly sensitive high-performance liquid chromatographic-tandem mass spectrometric method for the analysis of dextromethorphan in human plasma.
abstract: A stable-isotope-dilution HPLC-tandem mass spectrometry-based method was developed for the determination of dextromethorphan in human plasma. Plasma samples were prepared for analysis by solid-phase extraction on octadecylsilane extraction cartridges. Dextromethorphan and the deuterium-labeled dextromethorphan internal standard were chromatographed on a short reversed-phase column and detected by a selected-reaction-monitoring scheme. Linear standard curves were obtained over three orders of magnitude and the limit of quantitation for dextromethorphan was 50 pg/ml, using a 1-ml plasma sample. The combination of HPLC and electrospray tandem mass spectrometry resulted in a rapid, selective and sensitive method for the analysis of dextromethorphan in plasma. The method was applied for the evaluation of the pharmacokinetic profile of dextromethorphan in human volunteers following peroral administration.
authors.affiliation: Procter & Gamble Pharmaceuticals, Mason, OH 45040, USA.
authors.forename: T H
authors.initials: TH
authors.lastname: Eichhold
authors.forename: M
authors.initials: M
authors.lastname: Quijano
authors.forename: W L
authors.initials: WL
authors.lastname: Seibel
authors.forename: C A
authors.initials: CA
authors.lastname: Cruze
authors.forename: R L
authors.initials: RL
authors.lastname: Dobson
authors.forename: K R
authors.initials: KR
authors.lastname: Wehmeyer
mesh_terms: D000328:Adult; D000996:Antitussive Agents / Q000097:blood* / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003915:Dextromethorphan / Q000097:blood* / Q000493:pharmacokinetics; D006801:Humans; D008297:Male; D013058:Mass Spectrometry / Q000379:methods*; D008875:Middle Aged; D012015:Reference Standards; D012016:Reference Values; D012680:Sensitivity and Specificity
chemical_list: D000996:Antitussive Agents; D003915:Dextromethorphan