title: High performance liquid chromatographic determination of cox-2 inhibitor rofecoxib in human plasma.
abstract: A convenient, sensitive and simple method for the determination of rofecoxib in human plasma is presented. The analytical technique is based on reversed phase high performance liquid chromatography coupled with UV detector (Knauer, Germany) set at 272 nm. The retention time of rofecoxib after recovery from plasma, was 8.9 minutes. The method has been validated over a linear range of 50-450 ng/ml from plasma. After validation the method was used to study the pharmacokinetic profile of rofecoxib in 6 healthy volunteers as per DCGI guidelines after administration of a single oral dose (50 mg). The extraction efficiency from plasma varied from 93.95-99.58%. The minimum quantifiable concentration was set at 50 ng/ml (% CV < 10%). The pharmacokinetic parameters were Cmax = 318.58 +/- 30.65 ng/ml at tmax = 2.66 +/- 0.25 hours, AUC0-t = 4007.88 +/- 438.32 ng hour/ml, AUC0-yen = 5454.66 +/- 822.29 ng hour/ml, Kel = 0.0433 +/- 0.0067/hour, and t1/2 = 16.36 +/- 2.89 hours.
authors.affiliation: Bioequivalence Study Centre, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032.
authors.forename: U
authors.initials: U
authors.lastname: Mandal
authors.forename: M
authors.initials: M
authors.lastname: Ganesan
authors.forename: M
authors.initials: M
authors.lastname: Jayakumar
authors.forename: T K
authors.initials: TK
authors.lastname: Pal
authors.forename: T K
authors.initials: TK
authors.lastname: Chattaraj
authors.forename: Krishnangshu
authors.initials: K
authors.lastname: Ray
authors.forename: S N
authors.initials: SN
authors.lastname: Banerjee
mesh_terms: D019540:Area Under Curve; D002851:Chromatography, High Pressure Liquid; D016861:Cyclooxygenase Inhibitors / Q000097:blood* / Q000493:pharmacokinetics; D006801:Humans; D007783:Lactones / Q000097:blood* / Q000493:pharmacokinetics; D012015:Reference Standards; D015203:Reproducibility of Results; D013450:Sulfones
chemical_list: D016861:Cyclooxygenase Inhibitors; D007783:Lactones; D013450:Sulfones; C116926:rofecoxib