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