1. How it works Sildenafil may be used to treat erectile dysfunction (ED or impotence) in men (Viagra brand) or pulmonary arterial hypertension in both men and women (Revatio .Sildenafil Viagra is used to treat erectile dysfunction impotence; inability to get or keep an erection in men. Generic versions of sildenafil, vardenafil and tadalafil are available. An inherited eye disease that affects the retina. The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire. Side effects Side effects of oral ED medicines are often mild. The body takes longer to absorb it after a high-fat meal or alcohol. They have the same benefits and risks as their brand-name counterparts.Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in men. It is also used to treat pulmonary arterial hypertension, a serious heart and lung . By Ginger Skinner Last updated: June 14, If you’re looking for a less costly Viagra, you might want to ask your doctor about sildenafil. It’s the active ingredient in both . Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in .If you are taking sildenafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. Common ones include: Flushing of the skin. Also tell your doctor if you or any of your family members have or have ever had an eye disease such as retinitis pigmentosa an inherited eye condition that causes loss of vision or if you have ever had sudden severe vision loss, especially if you were told that the vision loss was caused by a blockage of blood flow to the nerves that help you see. Avanafil Stendra. ED medications can cause side effects, and it’s crucial to have access to a medical provider if needed. It might work longer if you have mild to moderate erectile dysfunction.