More powerful CYP3A4 inhibitors like ketoconazole or itraconazole could be envisioned to have larger effects than found with saquinavir. A beginning dose of twenty five mg of VIAGRA need to be regarded as in sufferers taking erythromycin or sturdy CYP3A4 inhibitors (like saquinavir, ketoconazole, itraconazole) [see DOSAGE AND ADMINISTRATION, Medica

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