Cenforce Tablet is used to treat Erectile dysfunction (impotence; inability to get or keep an erection) in millions of men. Sildenafil is used to improve the ability to exercise in adults with pulmonary arterial hypertension. Sildenafil is in a class of medications called PDE inhibitors. Sildenafil treats erectile dysfunction by increasing blood flow to the penis during physical stimulation. This increased blood flow can cause an erection. Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow smoothly.