- Treatment within 3 months prior to Day 1 with any potent cytochrome P450 (CYP) 3A4/5 inhibitors (e.g., verapamil, ketoconazole, micronazole, itraconazole, erythromycin, telithromycin, clarithromycin, indinavir, saquinavir, ritonavir, nelfinavir, lopinavir, atazanavir, amprenavir, fosamprenavir, delavirdine) or CYP3A4/5 inducers (carbamazepine, dexamethasone, felbamate, omeprazole, phenobarbital, phenytoin, amobarbital, nevirapine, primidone, rifabutin, rifampin, St. John's wort)