Side Effects of Impotence Drugs Viagra, Cialis & Levitra


Like all prescription medications, impotence drugs may produce some side effects. These side effects are generally mild to moderate in nature, and usually go away within a few hours of use.

Side effects that may occur while taking sexual enhancements may vary from one drug to another and include headache, flushing, upset stomach, stuffy nose, diarrhea, blurred vision, changes in blue or green vision, or increased light sensitivity, back pain, and or muscle aches.

A small number of men have lost eyesight in one eye some time after taking Viagra, Cialis, or Levitra. This type of vision loss is called non-arteritic anterior ischemic optic neuropathy (NAION). NAION causes a sudden loss of eyesight because blood flow is blocked to the optic nerve.

NAION also happens in men who do not take impotence medicines. People who have a higher chance for NAION include those who:

have heart disease
over 50 years old
have diabetes
have high blood pressure
have high cholesterol
have certain eye problems

Lessening Side Effects

To avoid some of Side Effects, you can do the following:

Lower your dose
To avoid dizziness and lightheadedness when rising from a seated or lying position, get up slowly.
Drink a lot of water to keep the headache and sinus pressure to a minimum.
Take one Aleve tablet to offset the headache.
Slight nasal congestion, flushing or stuffiness are easily remedied with decongestants taken beforehand.

Additional information:

If your symptoms do not improve or if they become worse, check with your doctor. Contact your doctor as soon as possible if you experience prolonged abnormal, painful erections. DO NOT SHARE THIS MEDICINE with others for whom it was not prescribed. DO NOT USE THIS MEDICINE for other health conditions. KEEP THIS PRODUCT out of the reach of children.

Do not exceed the recommended dose without checking with your doctor. DO NOT TAKE THESE MEDICINES MORE THAN once a day. DO NOT TAKE THESE MEDICINES IF YOU TAKE OR USE NITROGLYCERIN, including nitroglycerin tablets for chest pain, patches, or ointment, OR OTHER NITRATES, such as isosorbide. If you are not sure whether a certain medicine is a nitrate, contact your doctor or pharmacist. USE OF THESE MEDICINES WILL NOT PREVENT the spread of sexually transmitted diseases (STDs), including human immunodeficiency virus (HIV).

If overdose is suspected, contact your local poison control center at 1-800-222-1222 or emergency room immediately.

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Sources: US Food and Drug Association (