Much better CYP3A4 inhibitors for example ketoconazole or itraconazole can be predicted to own greater results than found with saquinavir. A beginning dose of twenty five mg of VIAGRA need to be considered in sufferers having erythromycin or robust CYP3A4 inhibitors (for instance saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMINISTRATIO