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More powerful CYP3A4 inhibitors which include ketoconazole or itraconazole may very well be envisioned to obtain better consequences than observed with saquinavir. A starting dose of 25 mg of VIAGRA ought to be considered in individuals having erythromycin or potent CYP3A4 inhibitors (such as saquinavir, ketoconazole, itraconazole) [see DOSAGE AND