Specification :

Viagra 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. Do not take Viagra while also taking Revatio, unless your doctor tells you to.

Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin ( Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, and others) , isosorbide dinitrate ( Dilatrate-SR, Isordil, Sorbitrate) , and isosorbide mononitrate ( Imdur, ISMO, Monoket) . Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ( " poppers" ) . Taking Viagra with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack. During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of Viagra.