It is possible that you may experience some or none of the MSM side effects explained above. 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 taking MSM or if something "just does not seem right" during treatment. While it may not be a side effect of MSM, your healthcare provider will be able to diagnose and treat the problem.