Antacids have no influence on the pharmacokinetics of rabeprazole, a new proton pump inhibitor, in healthy volunteers
Yasuda, S.; Higashi, S.; Murakami, M.; Tomono, Y.; Kawaguchi, M.
International Journal of Clinical Pharmacology and Therapeutics 37(5): 249-253
1999
ISSN/ISBN: 0946-1965 PMID: 10363624 Document Number: 500028
Aim: This randomized, open-label, crossover study was conducted to evaluate the effect of a single dose of antacid, aluminum and magnesium hydroxide suspension, on pharmacokinetics of rabeprazole in healthy male volunteers. Subjects and methods: Twelve subjects were randomly divided into 6 groups of 2 subjects each, and received 20 mg of rabeprazole either without antacid, concomitantly with antacid, or one hour after administration of antacid in three experimental arms with washout period of one week. The concentrations of rabeprazole in plasma were determined by high performance liquid chromatography. Results: Rabeprazole was well tolerated at the 20 mg dose level when given with or without antacid. The pharmacokinetic parameters, Cmax, tmax, AUC and t1/2, showed no statistically significant differences when rabeprazole was administered alone, concomitantly with antacid or one hour after antacid administration. Conclusion: No influence of single dose of antacid on pharmacokinetics of rabeprazole was observed.