Stronger CYP3A4 inhibitors including ketoconazole or itraconazole may be predicted to obtain bigger consequences than seen with saquinavir. A starting dose of twenty five mg of VIAGRA need to be thought of in people getting erythromycin or sturdy CYP3A4 inhibitors (including saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMINISTRATION, CL