Get emergency help immediately if you experience hives, shortness of breath, swelling of your face, lips, tongue, and throat—These are signs of an allergic reaction to sildenafil (Viagra).
The most common side effects of Viagra include:
These Viagra side effects do not usually require medical attention and often get better over time as the body gets used to the drug. However, you should report these side effects of Viagra to your prescribing physician if they do not improve or are bothersome.
There can be more serious side effects of Viagra. Stop taking Viagra and get emergency medical care if you experience these symptoms:Allergic reactions as mentioned above
Let your doctor know if you have the following symptoms:
The above list may not include all the potential side effects of Viagra (sildenafil). Speak to your doctor if you have severe side effects or if the side effects do not improve over time. You can also report unusual Viagra side effects to the Food and Drug Administration at 1-800-FDA-1088.
Viagra Overdose: If you think you have taken too much Viagra, call your doctor or call the Poison Help Line at 1-800-222-1222. If your symptoms are severe, please call 911 and seek emergency medical care immediately.
Symptoms of an overdose of Viagra include:
NOTE: Viagra is a prescription medicine to be used only by you—never share your Viagra with others or use someone else’s Viagra tablets.
Source: FDA