title: A validated high-performance liquid chromatographic assay for determination of lumiracoxib in human plasma.
abstract: Lumiracoxib {2-[(2-fluoro-6-chlorophenyl)amino]-5-methyl-benzeneacetic acid} is a highly selective and potent cyclooxygenase-2 (COX-2) inhibitor, which is chemically distinct from other coxibs in that it contains a carboxylic group and is weakly acidic. In the present study, a liquid-liquid extraction-based reversed-phase HPLC method with UV detection was validated and applied for the analysis of lumiracoxib in human plasma. The analyte was separated on a reversed-phase column with acetonitrile and 0.05% trichloracetic acid in water (35:65, v/v) as mobile phase at a flow rate of 1 mL/min, and UV detection at 270 nm. The retention times for lumiracoxib and niflumic acid (internal standard) were 16.9 and 10.4 min, respectively. The validated quantitation range for lumiracoxib was 10-10,000 ng/mL. The developed procedure was applied to assess the pharmacokinetics of lumiracoxib following administration of a single oral 200 mg dose to a healthy male volunteer.
authors.affiliation: Department of Experimental and Clinical Pharmacology and Toxicology, Friedrich Alexander University Erlangen-Nürnberg, Fahrstrasse 17, D-91054 Erlangen, Germany.
authors.forename: Olga
authors.initials: O
authors.lastname: Cheremina
authors.forename: Kay
authors.initials: K
authors.lastname: Brune
authors.forename: Burkhard
authors.initials: B
authors.lastname: Hinz
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D052246:Cyclooxygenase 2 Inhibitors / Q000097:blood / Q000737:chemistry / Q000493:pharmacokinetics; D004008:Diclofenac / Q000031:analogs & derivatives* / Q000097:blood / Q000493:pharmacokinetics; D006801:Humans; D008297:Male; D015394:Molecular Structure; D015203:Reproducibility of Results
chemical_list: D052246:Cyclooxygenase 2 Inhibitors; D004008:Diclofenac; C473384:lumiracoxib