Steady-state concentrations of mirtazapine, N-desmethylmirtazapine, 8-hydroxymirtazapine and their enantiomers in relation to cytochrome P450 2D6 genotype, age and smoking behaviour.

Abstract excerpt

BACKGROUND AND OBJECTIVE: Mirtazapine is a tetracyclic antidepressant drug available as a racemic mixture of S(+)- and R(-)-mirtazapine. These enantiomers have different pharmacological properties, and both contribute to the clinical and adverse effects of the drug. Cytochrome P450 (CYP) 2D6 has been implicated in the metabolism of S(+)-mirtazapine. However, the effect of CYP2D6 on serum concentrations of the...

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