Viagra Side Effects
Possible side effects
If you have any of the following serious side effects, stop taking Viagra and seek a doctor or tell your doctor immediately:
allergic reaction (difficulty breathing; closing of the throat, swelling of the lips, tongue, or a person or a rash);
chest pain or an irregular heart rhythm;
tumor at the feet or legs;
shortness of breath;
prolonged or severe dizziness;
long-term (more than 4 hours) or painful erection, or
dizziness, nausea, or angina (pain, tightness, discomfort, numbness or tingling in the chest, arm, neck or jaw).
Other, less serious side effects may be more likely to occur. Continue to take Viagra and talk to your doctor if you experience
flushing;
mild dizziness;
headaches;
nasal congestion;
diarrhea;
temporary blue tint in vision or other vision abnormalities, or
itching or rash.
Side effects other than those listed here may also occur. Talk with your doctor about any side effect that seems unusual or that is especially bothersome.
More
If you are over 65 years of age, may be more likely to experience side effects from Viagra. Your doctor may prescribe a lower dose of the drug