It is possible that you may experience some or none of these Cialis side effects. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have side effects from a medicine that you have never tried. Therefore, make sure to let your healthcare provider know if you develop any side effects while on Cialis. Also, let you healthcare provider know if you develop something that "just doesn't seem right." While it may not be a side effect of Cialis, your healthcare provider will still be able to diagnose and treat the problem.