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Viagra ingredient approved for hypertension
Pfizer Inc. on Monday said U.S. regulators approved the active ingredient in its impotence drug Generic Viagra to treat pulmonary hypertension.
The compound, called Revatio, contains the same active ingredient -- sildenafil citrate -- in Viagra.
Pulmonary hypertension is a rare disease where high pressure in the blood vessels moves from the heart to the lungs, Pfizer said. Viagra.
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