Viagra Side Effects

The following side effects should be reported to your doctor or health care professional as soon as they are noticed:

  • allergic reactions, including skin rash, itching or hives, the face, lips, or tongue swelling
  • breathing problems
  • hearing changes
  • changes in the vision, blurred vision, trouble telling the colors apart
  • chest pain
  • fast irregular heartbeat
  • prolonged or painful erection (lasting for more than 4 hours)
  • seizures

The below side effects usually do not necessary require any medical attention (please do report them to your physician if they are recurrent or bothersome):

  • diarrhea
  • flushing
  • headache
  • indigestion
  • stuffy or running nose

Other side effects are also possible, for the above list is not all inclusive. Consult with your doctor for advice regarding the side effects.