St. John's Wort Side Effects
You may experience some or none of the side effects listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have problems with a medicine or supplement that you have never tried.
Therefore, make sure to let your healthcare provider know if you develop any side effects while taking St. John's wort or if you experience something that "just does not seem right." While it may not be related to the supplement, your healthcare provider will be able to diagnose and treat the problem.