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 language | English |
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Pages (from-to) | 1712-1714 |
Number of pages | 3 |
Journal | Annals of Pharmacotherapy |
Volume | 36 |
Issue number | 11 |
DOIs | |
Publication status | Published - Nov 2002 |
Externally published | Yes |