Stronger CYP3A4 inhibitors like ketoconazole or itraconazole might be expected to own increased results than observed with saquinavir. A commencing dose of 25 mg of VIAGRA ought to be regarded as in individuals taking erythromycin or strong CYP3A4 inhibitors (such as saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMINISTRATION, Medical PH