Title : Cytochrome P450 3A inhibitor itraconazole affects plasma concentrations of risperidone and 9-hydroxyrisperidone in schizophrenic patients.

Pub. Date : 2005 Nov

PMID : 16321618






4 Functional Relationships(s)
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1 BACKGROUND AND OBJECTIVE: Despite the belief that cytochrome P450 (CYP) 2D6 alone is responsible for the metabolism of risperidone, several studies suggest that CYP3A may be involved. Risperidone cytochrome P450 family 3 subfamily A member 4 Homo sapiens
2 The aim of this study was to evaluate the effect of itraconazole, a CYP3A inhibitor, on the plasma concentrations of risperidone and 9-hydroxyrisperidone in schizophrenic patients in relation to CYP2D6 genotype. Risperidone cytochrome P450 family 3 subfamily A member 4 Homo sapiens
3 CONCLUSIONS: Our results provide in vivo evidence of the involvement of CYP3A in the disposition of risperidone and 9-hydroxyrisperidone. Risperidone cytochrome P450 family 3 subfamily A member 4 Homo sapiens
4 In addition to CYP2D6, treatment with CYP3A inhibitor(s) including itraconazole may influence clinical symptoms and risperidone side effects. Risperidone cytochrome P450 family 3 subfamily A member 4 Homo sapiens