title: Analysis of terfenadine in human plasma using microbore high-performace liquid chromatography-electrospray ionisation mass spectrometry.
abstract: An assay based on combined microbore high-performance liquid chromatography-positive ion electrospray ionisation mass spectrometry with selected ion recording has been developed for the measurement of the antihistamine drug terfenadine in human plasma. A deuterated analogue of terfenadine was synthesised for use as an internal standard and extraction of terfenadine was carried out on C18 solid phase extraction columns. The limit of detection of terfenadine in plasma is 0.1 ng/ml and the intra-assay coefficient of variation at 1 ng/ml is 10.1%. Plasma concentrations of terfenadine measured in six normal subjects following a 120 mg oral dose are reported.
authors.affiliation: Department of Clinical Pharmacology, Royal Postgraduate Medical School, London, UK.
authors.forename: D A
authors.initials: DA
authors.lastname: Adams
authors.forename: S
authors.initials: S
authors.lastname: Murray
authors.forename: C P
authors.initials: CP
authors.lastname: Clifford
authors.forename: N B
authors.initials: NB
authors.lastname: Rendell
authors.forename: D S
authors.initials: DS
authors.lastname: Davies
authors.forename: G W
authors.initials: GW
authors.lastname: Taylor
mesh_terms: D018926:Anti-Allergic Agents / Q000097:blood*; D018927:Anti-Asthmatic Agents / Q000097:blood*; D002851:Chromatography, High Pressure Liquid; D006634:Histamine H1 Antagonists / Q000097:blood*; D006801:Humans; D008297:Male; D013058:Mass Spectrometry; D012680:Sensitivity and Specificity; D016593:Terfenadine / Q000097:blood*
chemical_list: D018926:Anti-Allergic Agents; D018927:Anti-Asthmatic Agents; D006634:Histamine H1 Antagonists; D016593:Terfenadine