Sildenafil for the Treatment of Pulmonary Hypertension

Drug Interactions

Because of their cognition to inhibit CYP3A4 enzyme trait, viagra should not be administered with azole antifungals, clarithromycin, erythromycin, and protease inhibitors such as indinavir, ritonavir, and saquinavir.
Giving medication with the nonspecific enzyme inhibitor cimetidine increases plasm viagra concentrations by approximately 50%.
Rifampin, an persuader of CYP3A4, decreases levels of sildenafil.
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