More robust CYP3A4 inhibitors which include ketoconazole or itraconazole might be envisioned to have bigger results than viewed with saquinavir. A starting dose of 25 mg of VIAGRA must be thought of in people having erythromycin or powerful CYP3A4 inhibitors (for example saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMINISTRATION, Scient