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More robust CYP3A4 inhibitors like ketoconazole or itraconazole could be predicted to own bigger consequences than seen with saquinavir. A starting dose of twenty five mg of VIAGRA must be deemed in patients getting erythromycin or robust CYP3A4 inhibitors (such as saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMINISTRATION, Medical PHAR