title: Bioequivalence evaluation of two rabeprazole enteric coated formulations in healthy Chinese volunteers.
abstract: A bioequivalence study of two rabeprazole enteric-coated formulations was carried out in 20 healthy Chinese volunteers according to a single dose, two-sequence, crossover randomized design. The two formulations were administered in two treatment days, separated by a washout period of 7 days. Blood samples were collected at specified time intervals over 10 hours post-dosing. Plasma samples were separated and assayed for rabeprazole using a selective and sensitive HPLC method with UV detection. The pharmacokinetic parameters AUC(0-T), AUCmax, Cmax, tmax, t(1/2) and MRT were determined from plasma concentration-time profile of both formulations. ANOVA and two one-sided t test procedures showed no significant difference in log-transformed Cmax, AUC(0-T) AUC(0-infinity) while the 90% confidence interval (CI) of the ratio of the geometric means of their values were also used to assess bioequivalence between the two formulations. The results of this study indicated that the two rabeprazole formulations can be considered to be bioequivalent.
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Wen Ming
authors.initials: WM
authors.lastname: Jiang
authors.forename: Xiao Ling
authors.initials: XL
authors.lastname: Gao
authors.forename: Xinguo
authors.initials: X
authors.lastname: Jiang
authors.forename: Qi Zhi
authors.initials: QZ
authors.lastname: Zhang
authors.forename: Zhao Hua
authors.initials: ZH
authors.lastname: Zheng
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000328:Adult; D001562:Benzimidazoles / Q000008:administration & dosage / Q000493:pharmacokinetics*; D001682:Biological Availability; D002214:Capsules; D002626:Chemistry, Pharmaceutical; D002851:Chromatography, High Pressure Liquid; D018592:Cross-Over Studies; D004311:Double-Blind Method; D004791:Enzyme Inhibitors / Q000008:administration & dosage / Q000493:pharmacokinetics*; D006801:Humans; D008297:Male; D009853:Omeprazole / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000493:pharmacokinetics*; D064750:Rabeprazole; D013056:Spectrophotometry, Ultraviolet; D013608:Tablets, Enteric-Coated; D013810:Therapeutic Equivalency
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D001562:Benzimidazoles; D002214:Capsules; D004791:Enzyme Inhibitors; D013608:Tablets, Enteric-Coated; D064750:Rabeprazole; D009853:Omeprazole