(BUSINESS WIRE)--Pfizer announced today that the U.S. Food and Drug Administration (FDA) has approved Revatio® (sildenafil) Injection, an intravenous formulation of Revatio. Revatio is the only FDA-approved phosphodiesterase-5 (PDE5) inhibitor available in both tablet and intravenous formulations. Revatio is indicated for the treatment of adult patients with pulmonary arterial hypertension (WHO Group I) to improve exercise
