Effects of Evodia rutaecarpa and rutaecarpine on the pharmacokinetics of caffeine in rats.

Abstract:

:To assess possible herb-drug interactions, rutaecarpine (an herbal ingredient of Evodia rutaecarpa; 25 mg/kg/day, p. o.), the ethanol extract of Evodia rutaecarpa (1 g/kg/day, p. o.), and an herbal preparation of Evodia rutaecarpa (Wu-Chu-Yu-Tang; 1 g/kg/day) were individually pretreated daily for three consecutive days in rats and on the fourth day caffeine was administered (2 mg/kg, i. v.). Caffeine concentrations in blood, brain and bile were concurrently measured by microdialysis coupled to a liquid chromatographic system. Pharmacokinetic data were calculated by a non-compartmental model. The results indicate that the caffeine crosses the blood-brain barrier and goes through hepatobiliary excretion. The caffeine level was significantly decreased by the pretreatment of rutaecarpine, the extract of Evodia rutaecarpa and herbal preparation Wu-Chu-Yu-Tang. This finding should be very important whenever herb-drug interactions would be possible for a herbal remedy.

journal_name

Planta Med

journal_title

Planta medica

authors

Tsai TH,Chang CH,Lin LC

doi

10.1055/s-2005-871270

subject

Has Abstract

pub_date

2005-07-01 00:00:00

pages

640-5

issue

7

eissn

0032-0943

issn

1439-0221

journal_volume

71

pub_type

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