title: Simultaneous determination of chlorpheniramine and pseudoephedrine in human plasma by liquid chromatography-tandem mass spectrometry.
abstract: A sensitive and specific procedure for simultaneous quantitation of chlorpheniramine and pseudoephedrine in human plasma has been developed and validated. Analytes were extracted from plasma samples by liquid-liquid extraction, separated on a Diamonsil C18 column (250 x 4.6 mm i.d.) and detected by tandem mass spectrometry with an atmospheric pressure chemical ionization interface. Diphenhydramine was used as the internal standard. The method has a lower limit of quantitation of 0.2 and 2.0 ng/mL for chlorpheniramine and pseudoephedrine, respectively. The intra- and inter-day relative standard deviation, calculated from quality control (QC) samples were below 4.3% for chlorpheniramine and below 9.5% for pseudoephedrine. The inter-day relative error as determined from QC samples was within 4.7% for each analyte. The overall extraction recoveries of chlorpheniramine and pseudoephedrine were 77 and 61% on average, respectively. The method was successfully applied to pharmaockinetic study of chlorpheniramine and pseudoephedrine in volunteers receiving formulations containing 4 mg of chlorpheniramine maleate and 60 mg of pseudoephedrine hydrochloride.
authors.affiliation: Laboratory of Drug Metabolism and Pharmacokinetics, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, People's Republic of China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Chen
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Dafang
authors.initials: D
authors.lastname: Zhong
mesh_terms: D018926:Anti-Allergic Agents / Q000097:blood / Q000493:pharmacokinetics; D000697:Central Nervous System Stimulants / Q000097:blood / Q000493:pharmacokinetics; D002744:Chlorpheniramine / Q000097:blood* / Q000493:pharmacokinetics; D002853:Chromatography, Liquid / Q000379:methods; D004155:Diphenhydramine / Q000737:chemistry; D004809:Ephedrine / Q000097:blood* / Q000493:pharmacokinetics; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods*; D012015:Reference Standards; D015203:Reproducibility of Results
chemical_list: D018926:Anti-Allergic Agents; D000697:Central Nervous System Stimulants; D002744:Chlorpheniramine; D004155:Diphenhydramine; D004809:Ephedrine