- 14. Subjects taking strong CYP3A4-inhibiting protease inhibitors (specifically including atazanavir, indinavir, nelfinavir, saquinavir, and ritonavir), strong CYP3A4 inhibitors (specifically including clarithromycin, itraconazole, ketoconazole, nefazodone, telithromycin) and all strong CYP3A4 inducers (specifically including rifampin, efavirenz, etravirine, phenobarbital, phenytoin, and carbamazepine)