title: Lansoprazole pharmacokinetics in subjects with various degrees of kidney function.
abstract: The pharmacokinetics of lansoprazole, a new benzimidazole proton pump inhibitor, was evaluated after multiple-dose oral administration to 20 subjects with various degrees of kidney function. Multiple blood samples were obtained after doses 1 and 7 of the once-daily seven-dose regimen, and plasma concentrations of lansoprazole and five metabolites were quantitated with use of HPLC. The free fraction of lansoprazole increased as kidney function declined. A significant, although weak, relationship existed between creatinine clearance (CLCR) and area under the plasma concentration versus time curve (AUC) and terminal disposition half-life (t1/2), calculated with total concentration data. Those individuals with lower CLCR values also had lower total AUC and t1/2 values. However, there was no statistically significant relationship between CLCR and peak plasma concentration or AUC, calculated with unbound concentration data. No adjustment of lansoprazole dose is recommended on the basis of impaired kidney function.
authors.affiliation: Department of Pharmacokinetics, Abbott Laboratories, Abbott Park, IL 60064-3500, USA.
authors.forename: M D
authors.initials: MD
authors.lastname: Karol
authors.forename: J M
authors.initials: JM
authors.lastname: Machinist
authors.forename: J M
authors.initials: JM
authors.lastname: Cavanaugh
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000328:Adult; D000368:Aged; D019540:Area Under Curve; D016022:Case-Control Studies; D006207:Half-Life; D006801:Humans; D007668:Kidney / Q000502:physiology* / Q000503:physiopathology; D007674:Kidney Diseases / Q000097:blood / Q000503:physiopathology*; D064747:Lansoprazole; D008875:Middle Aged; D009853:Omeprazole / Q000031:analogs & derivatives* / Q000097:blood / Q000493:pharmacokinetics; D011485:Protein Binding; D054328:Proton Pump Inhibitors; D012720:Severity of Illness Index
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D054328:Proton Pump Inhibitors; D064747:Lansoprazole; D009853:Omeprazole