Viagra Side Effects


Viagra (sildenafil) relaxes muscles and increases blood flow to particular areas of the body. Viagra is used to treat erectile dysfunction (impotence) in men. Learn more about Viagra and Viagra Side Effects.

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 sudden and serious decrease in blood pressure.

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.

Do not take Viagra more than once a day. Allow 24 hours to pass between doses. Do not take Viagra while also taking Revatio, unless your doctor tells you to.

Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.

Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking Viagra, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoke or are over 50 years old. It is not clear whether Viagra is the actual cause of vision loss.

Viagra Side Effects

Less serious Viagra side effects may include:

  • warmth or redness in your face, neck, or chest;
  • stuffy nose;
  • headache;
  • memory problems;
  • upset stomach; or
  • back pain.

Stop using Viagra and call your doctor at once if you have a serious side effect such as:

  • sudden vision loss;
  • ringing in your ears, or sudden hearing loss;
  • chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;
  • irregular heartbeat;
  • swelling in your hands, ankles, or feet;
  • shortness of breath;
  • vision changes;
  • feeling light-headed, fainting; or
  • penis erection that is painful or lasts 4 hours or longer.

Stop using Viagra and get emergency medical help if you have sudden vision loss.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

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.

This is not a complete list of the Cialis side effects and others may occur. Call your doctor for medical advice about side effects.

If you think Cialis is right for you and would like to purchase some at a discounted rate online from an accredited Canadian Pharmacy go to CanadaDrugsDirect.com.


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