More robust CYP3A4 inhibitors for example ketoconazole or itraconazole could possibly be predicted to obtain increased results than seen with saquinavir. A setting up dose of twenty five mg of VIAGRA must be deemed in sufferers having erythromycin or powerful CYP3A4 inhibitors (which include saquinavir, ketoconazole, itraconazole) [see DOSAGE AND A