7. Concomitant use of drugs that inhibit CYP3A4 (e.g., ritonavir, ketoconazole, itraconazole, troleandomycin, clarithromycin, nelfinavir, nefazodone, amprenavir, aprepitant, diltiazem, erythromycin, fluconazole, fosamprenavir, MAO inhibitors and verapamil)