In the event that your physician determines that you have some level of erectile dysfunction and that Cialis could help, be aware of the possible side effects you may experience, some more common than others:
- The most commonly reported side effects from Cialis are headache, congestion, upset stomach, muscle ache, back pain and flushing.
- In rare cases, men have experienced sudden decreases or changes in vision after using Cialis.
- Also on rare occasions, men taking Cialis have reported a condition known as priapism (an erection lasting more than four hours). This condition requires immediate medical attention.
