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Revatio sildenafil is used to treat pulmonary hypertension (high blood pressure in the blood vessels between the heart and lungs) when people have not responded to conventional treatment. It helps reduce pulmonary blood pressure by widening blood vessels. It may also be used for other conditions as determined by your doctor. The recommended dose of sildenafil for pulmonary hypertension is 20 mg three times daily, approximately 6 to 8 hours apart. It can be taken with or without food.

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