Are there any side effects with Cialis?

As with any drug product, there may be side effects.

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The most commonly reported side effects in patients treated with Cialis during the testing of the product were:

      • headache
      • indigestion
      • back pain
      • muscle pain
      • flushing
      • stuffy nose

Patients who get back pain and muscle aches usually get them 12 to 24 hours after taking Cialis and these usually go away by themselves within 48 hours. A small number of patients taking Cialis also reported abnormal vision.