title: Rapid micromethod for simultaneous measurement of oxcarbazepine and its active metabolite in plasma by high-performance liquid chromatography.
abstract: A rapid method for the simultaneous determination of oxcarbazepine (OXC) and its active metabolite (10-hydroxycarbazepine) in human and rat plasma by reversed phase high-performance liquid chromatography is described. The method involves a simple one-step extraction of the drugs from plasma with dichloromethane. The extract was evaporated and the residue was reconstituted with mobile phase and injected onto a Novapak C18 column. The eluting solvent was 20% acetonitrile in water at a flow rate of 1.5 ml/min and the detector was monitored at 215 nm. The detection limit of OXC and 10-hydroxycarbazepine was 50 and 20 ng/ml, respectively. The within-day and between-day coefficients of variation for OXC and its active metabolite were 2.57-6.95% and 4.21-8.3%, respectively. The relative and absolute recoveries varied between 71.4% and 104.0%. The applicability of the analytical procedure to pharmacokinetic studies was illustrated.
authors.affiliation: Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.
authors.forename: K M
authors.initials: KM
authors.lastname: Matar
authors.forename: P J
authors.initials: PJ
authors.lastname: Nicholls
authors.forename: M I
authors.initials: MI
authors.lastname: al-Hassan
authors.forename: A
authors.initials: A
authors.lastname: Tekle
mesh_terms: D000818:Animals; D000927:Anticonvulsants / Q000097:blood*; D002220:Carbamazepine / Q000031:analogs & derivatives* / Q000097:blood; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004355:Drug Stability; D006801:Humans; D008297:Male; D008832:Microchemistry / Q000379:methods; D000078330:Oxcarbazepine; D051381:Rats; D017207:Rats, Sprague-Dawley; D012680:Sensitivity and Specificity
chemical_list: C039775:10,11-dihydro-10-hydroxycarbamazepine; D000927:Anticonvulsants; D002220:Carbamazepine; D000078330:Oxcarbazepine