It is possible that you may experience some or none of these Viagra 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 Viagra. Also, let your healthcare provider know if you develop something that "just doesn't seem right." While it may not be a Viagra side effect, but your healthcare provider will still be able to diagnose and treat the problem.