Parkinson’s can be unpredictable – symptoms can come and go or get better and worse throughout the day. These so-called “on-off” fluctuations (also called motor fluctuations) and dyskinesias can be troubling, but movement disorder specialists can help with the choice of medication, dosages, and timing. Dr. Irene Malaty explains more about what causes these changes and how you can work with your doctor to manage them.