sores in the mouth and throatsevere or ongoing diarrheapain, burning, numbness, pricking, or tingling in the hands or feet or on the skinuncontrollable shaking of a part of your bodyconfusionhallucinating (seeing things or hearing voices that do not exist)seizuresvision changesfaintingdizziness fast or irregular heartbeatfever, sore throat, chills, or other signs of infectionunusual bruising or bl