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Title: The effect of nefazodone on clozapine plasma concentrations. Author: Taylor D, Bodani M, Hubbeling A, Murray R. Journal: Int Clin Psychopharmacol; 1999 May; 14(3):185-7. PubMed ID: 10435773. Abstract: The cytochrome enzyme p4503A4 (CYP3A4) is thought to play a major part in the human metabolism of clozapine. Nefazodone is a potent and specific in-vivo inhibitor of CYP3A4. We co-administered nefazodone and clozapine in six patients and found that mean clozapine levels rose by 4% of baseline and norclozapine levels by 16%. Based on these observations, it is inferred that inhibition of CYP3A4 in vivo has minimal effects on clozapine metabolism. Nefazodone appears to be safe when co-administered with clozapine.[Abstract] [Full Text] [Related] [New Search]