Viagra Side Effects and Warnings

Viagra should not be used in the following conditions:

• Recent heart attack or stroke
• Heart failure
• Concurrent use of nitrate
• Concurrent use of other medicines for erectile dysfunction
• Hereditary retinal disorders, such as retinitis pigmentosa

Viagra should be used with caution in the following:

• Liver or kidney failure
• Bleeding disorders
• Ulcer disease
• Heart disease
• Concurrent use of blood pressure medicines, especially alpha-blockers
• The elderly

Viagra must be obtained by prescription. There is important information your doctor needs to know about your health before the medicine is prescribed.

Possible side effects include:

• Headache
• Flushing
• Indigestion
• Visual disturbances, a condition known as nonarteritic anterior ischemic optic neuropathy (NAION) that can cause sudden blindness
• Drug interactions