sildenafil, Viagra (cont.)

Pharmacy Author:
Medical and Pharmacy Editor:

SIDE EFFECTS: Approximately 15% of persons taking Viagra experience side effects. The most common side effects are:


Rare cases of vision changes, including sudden temporary or permanent vision loss have been reported. Phosphodiesterase-5 inhibitors have been associated rarely with non-arteritic (non-inflammatory), anterior ischemic optic neuropathy (NAION), a condition that causes decreased vision and may lead to blindness. Patients should stop use of all PDE5 inhibitors and seek medical attention if they experience sudden loss of vision in one or both eyes.

Sudden hearing loss has been reported with phosphodiesterase inhibitors such as sildenafil, sometimes with ringing in the ears and dizziness. If changes in hearing occur, patients should discontinue their sildenafil and seek immediate medical attention.

Heart attacks, stroke, and irregular heartbeats have been reported during treatment with sildenafil. Symptoms of heart attack include

Prolonged erections greater than four hours and priapism (painful penis erections greater than 6 hours in duration) rarely occur. Patients should seek immediate medical attention if such abnormal erections occur.

Sildenafil may cause edema (water retention), which causes swelling in hands, ankles, feet, or face. Shortness of breath, feeling light-headed, and fainting may also occur.



PREPARATIONS: Sildenafil (Viagra) is a blue, film-coated, rounded, diamond-shaped tablet that comes in 25, 50, and 100 mg tablets for treating impotence.

STORAGE: Tablets should be kept at room temperature between 15 C and 30 C (59 F and 86 F).

Medically Reviewed by a Doctor on 8/6/2015

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Pill Finder Tool

Need help identifying pills and medications?
Use the pill identifier tool on RxList.

Back to Medications Index

Health Solutions From Our Sponsors