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Pharmacokinetics of terbinafine and five known metabolites in children, after oral administration

✍ Scribed by H. Humbert; J. Denouël; M. D. Cabiac; H. Lakhdar; A. Sioufi

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
164 KB
Volume
19
Category
Article
ISSN
0142-2782

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✦ Synopsis

As an extensive study, the pharmacokinetics of terbinafine and five known metabolites have been investigated after single and repeated oral administration to 12 pediatric patients. After single administration of 125 mg terbinafine, four compounds were unconjugated and the hydroxymetabolites appeared in trace amounts as glucuronides. The main metabolites in plasma were unconjugated carboxy compounds. Kinetics of terbinafine and N-desmethylterbinafine metabolite were comparable. The interindividual AUC t variability was similar for terbinafine, N-desmethylterbinafine and carboxyterbinafine. In urine, the major fraction was the hydrophilic unconjugated N-desmethyl-carboxyterbinafine (15%). After repeated administration of 125 mg day -1 , mean trough levels of terbinafine, N-desmethylterbinafine, carboxyterbinafine and N-desmethylhydroxy-terbinafine, and also that of hydroxyterbinafine metabolite were similar, for each compound, on days 21, 42 and 56 denoting that steady state was reached at least on day 21 and no accumulation occurred between days 21 and 56.

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