Effect of acid secretion blockade by omeprazole on the relative bioavailability of orally administered furazolidone in healthy volunteers.

Abstract:

AIMS:The administration of omeprazole may interfere with the absorption of orally administered drugs by reducing gastric pH and hence tablet dissolution. The aim of this study was to investigate the effects of a 5 day administration of omeprazole on the pharmacokinetics of furazolidone. METHODS:Eighteen healthy (nine male and nine female) volunteers were selected. The study had an open randomized two-period crossover design with a 21 day washout period between the phases. Serum concentrations of furazolidone were measured by reversed-phase h.p.l.c. with ultraviolet detection. RESULTS:Administration of omeprazole caused a significant reduction of Cmax [0.34 microg x ml(-1) (range 0.25-0.43) vs 0.24 microg x ml(-1) (range 0.15-0.34)] with no significant delay in absorption tmax [2.5 h (range 1.85-3.0) vs 2.4 h (range 2.06-2.71)]. CONCLUSIONS:Furazolidone was rapidly absorbed after oral administration. Short-term treatment with omeprazole did alter the relative bioavailability of this drug, probably through an effect on absorption kinetics or first-pass metabolism.

journal_name

Br J Clin Pharmacol

authors

Calafatti SA,Ortiz RA,Deguer M,Martinez M,Pedrazzoli J Jr

doi

10.1046/j.0306-5251.2001.01435.x

keywords:

subject

Has Abstract

pub_date

2001-08-01 00:00:00

pages

205-9

issue

2

eissn

0306-5251

issn

1365-2125

pii

bcp435

journal_volume

52

pub_type

临床试验,杂志文章,随机对照试验
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    pub_type: 临床试验,杂志文章,随机对照试验

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