Pharmacokinetic interaction between nortriptyline and terbinafine

P. Hugo M. Van der Kuy*, Harrie A. van den Heuvel, Rob W. Kempen, Leo M.L. Vanmolkot

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

15 Citations (Scopus)
31 Downloads (Pure)

Abstract

OBJECTIVE: To clarify the mechanism of interaction between nortriptyline and terbinafine. CASE SUMMARY: Nortriptyline intoxication secondary to terbinafine treatment was observed in a woman with a major depressive disorder. This is the second report of this interaction. A rechallenge was performed during which serum concentrations were measured of nortriptyline and the 2 hydroxy metabolites. To document the case, genotyping of CYP2D6 was also performed. DISCUSSION: Metabolism by CYP2D6 is of major importance for the hydroxylation of nortriptyline, making it susceptible to competitive inhibition by terbinafine. CONCLUSIONS: The pharmacokinetic interaction between nortriptyline and terbinafine is probably due to inhibition of CYP2D6 of the nortriptyline metabolism by terbinafine. The interaction is not restricted to a subpopulation, but may occur even in persons without deviations in CYP2D6.

Original languageEnglish
Pages (from-to)1712-1714
Number of pages3
JournalAnnals of Pharmacotherapy
Volume36
Issue number11
DOIs
Publication statusPublished - Nov 2002
Externally publishedYes

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