Parkinson's symptoms. Buspirone can cause Parkinson-like symptoms including tremors, muscle weakness, shuffling gait, stooped posture, drooling, etc. Rare neurological effects include abnormal movements, decreased mobility, restlessness, involumtary mouth movements, and motor deficits. See your physician for a full discussion to weigh the risks and benefits. Http://www. Nlm. Nih. Gov/medlineplus/druginfo/meds/a688005.html.