What is sildenafil?

• Sildenafil relaxes muscles and increases blood flow to particular areas of the body.
• Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.
• Sildenafil may also be used for purposes other than those listed here...