Stronger CYP3A4 inhibitors which include ketoconazole or itraconazole may be expected to acquire better consequences than witnessed with saquinavir. A beginning dose of twenty five mg of VIAGRA really should be regarded as in people having erythromycin or robust CYP3A4 inhibitors (which include saquinavir, ketoconazole, itraconazole) [see DOSAGE AN