SIDE EFFECTS: Approximately 15% of persons taking Viagra experience side effects. The most common side effects are:
- facial flushing (1 in 10),
- headaches (1 in 6),
- stomach pain,
- nasal congestion,
- urinary tract infections (UTIs)
- diarrhea, and
- an inability to differentiate between the colors green and blue.
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.
- chest pain or heavy feeling,
- pain spreading to the arm or shoulder,
- shortness of breath,
- nausea, sweating, and
- generally ill feeling (malaise).
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.
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).
Quick GuideErectile Dysfunction (ED) Causes and Treatment
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.
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