You may experience some or none of the side effects listed in this article. Unfortunately, it can be difficult to tell if any particular side effect (such as nausea) is caused by Meridia or other factors. Therefore, make sure to let your healthcare provider know if you develop any possible Meridia side effects during treatment. Also, let your healthcare provider know if you develop something that "just does not seem right." While it may not be a side effect of Meridia, your healthcare provider will be able to diagnose and treat the problem.