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More powerful CYP3A4 inhibitors which include ketoconazole or itraconazole could possibly be predicted to obtain bigger outcomes than seen with saquinavir. A starting up dose of twenty five mg of VIAGRA ought to be regarded in people taking erythromycin or robust CYP3A4 inhibitors (for example saquinavir, ketoconazole, itraconazole) [see DOSAGE AND