More powerful CYP3A4 inhibitors for example ketoconazole or itraconazole might be envisioned to have better consequences than viewed with saquinavir. A starting up dose of twenty five mg of VIAGRA must be thought of in individuals having erythromycin or powerful CYP3A4 inhibitors (such as saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMI