More powerful CYP3A4 inhibitors such as ketoconazole or itraconazole can be predicted to own increased consequences than seen with saquinavir. A beginning dose of 25 mg of VIAGRA ought to be viewed as in people having erythromycin or sturdy CYP3A4 inhibitors (for example saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMINISTRATION, Medica