Estudo da influencia da acidez gastrica na farmacocinetica da furazolidona : implicações terapeuticas para a erradicação do Helicobacter pylori

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

Background: The administration of omeprazole may interfere with the absorption of orally administered drugs by reducing gastric pH and thus tablets dissolution.The aim of this study was to investigate the effects of a tive day administration of omeprazole on furazolidone pharmacokinetics. Methods: Eighteen healthy (male, female) volunteers were selected. The study had an open randomized two-period crossover design with a 21 day washout period between the phases. Plasma concentrations of furazolidone were measured by reversed-phase HPLC with ultraviolet detection. Results: Administration of omeprazole caused a signiticant reduction of Cmax (0.3426 .:t0.042 vs. 0.2440 .:t 0.046) and a not significant reduction of T1/2(4.869.:t 1.06 vs. 3.904 .:t 0.85 ) but did not interfere with other pharmacokinetic parameters of orally administered furazolidone. Conclusion: Our results indicate that furazolidone is well absorbed afier oral administration. Short-term treatment with omeprazole does not alter the bioavailablitity of furazolidone. The observed reduction in Cmaxand T1/2induced by acid blockade suggests a possible interference with the absorption kinetics of the drug

ASSUNTO(S)

farmacocinetica helicobacter pylori

ACESSO AO ARTIGO

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