Common Side Effects of Viagra
- Headache
- Flushing in the face, neck, or chest
- Upset stomach, indigestion
- Abnormal vision
- Nasal congestion
- Back pain
- Muscular pain or tenderness
- Nausea
- Dizziness
- Rash
- Diarrhea
Serious Side Effects of Viagra
- Change or loss of vision
- Ringing in ears or hearing loss
- Chest pain or irregular heartbeat
- Shortness of breath
- Lightheadedness
- Swelling in the hands, ankles, and feet
Stop taking Viagra and call your doctor immediately if you experience any of these serious side effects.
Hives, difficulty breathing, swelling of the face, lips, tongue, or throat are signs of an allergic reaction. Get medical help immediately. If your erection is painful or lasts for more than four hours (priapism), seek immediate medical attention, as permanent tissue damage and impotency could result.