Journal
EUROPEAN JOURNAL OF CLINICAL PHARMACOLOGY
Volume 56, Issue 4, Pages 285-288Publisher
SPRINGER-VERLAG
DOI: 10.1007/s002280000139
Keywords
absorption; activated charcoal; gastric lavage
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Objective: To compare the efficacy of activated charcoal and gastric lavage in preventing the absorption of moclobemide, temazepam, and verapamil 30 min after drug ingestion. Methods: In this randomized cross-over study with three phases, nine healthy volunteers received a single oral dose of 150 mg moclobemide, 10 mg temazepam, and 80 mg verapamil after an overnight fast. Thirty minutes later, they were assigned to one of the following treatments: 25 g activated charcoal as a suspension in 200 mi water, gastric lavage (10 x 200 mi), or 200 mi water (control). Plasma concentrations of moclobemide, temazepam, and verapamil were determined up to 24 h. Results: Activated charcoal reduced the area under the plasma concentration-time curve from 0 h to 24 h (AUC(0-24 h)) Of moclobemide and temazepam by 55% (P < 0.05) and by 45% (P < 0.05), respectively. The AUC(0-24 h) of verapamil was not significantly reduced by charcoal. Gastric lavage decreased the AUC(0-24 h) Of moclobemide by 44% (P < 0.05), but had no significant effect on that of temazepam or verapamil. The peak plasma concentration (C-max) of moclobemide, temazepam, and verapamil was reduced by 40%, 29% (P < 0.05), and 16%, respectively, by activated charcoal. Gastric lavage did not significantly decrease the C-max of any of these drugs. Conclusion. The absorption of moclobemide, temazepam, and verapamil can be moderately reduced by activated charcoal given 30 min after drug ingestion, while gastric lavage seems to be less effective.
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