As with any drug product, there may be side effects.
The most commonly reported side effects in patients treated with Cialis during the testing of the product were:
- back pain
- muscle pain
- 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.