Identification of drugs inhibiting thein vitrometabolism of tacrolimus by human liver microsomes

Abstract
1 Tacrolimus, an immunosuppressive macrolide, is metabolized by enzymes of the cytochrome P450 3A subfamily. In this study, 34 drugs were tested for their interactions with tacrolimus metabolism by human liver microsomes.2 Fifteen drugs which inhibit thein vitrometabolism of tacrolimus were identified: bromocriptine, corticosterone, dexamethasone, ergotamine, erythromycin, ethinyloestradiol, josamycin, ketoconazole, miconazole, midazolam, nifedipine, omeprazole, tamoxifen, troleandomycin and verapamil.