I am a 40 year old female. I take 60 mg Cymbalta daily, along with Alegra and multi vit. For the last several months I have had involuntary head shaking. My family has now noticed this as well. My head will shake from side to side as if saying "no". It is not severe shaking, but enough for someone to notice. It happens approx one or twice a week now. It used to be only once in a while. Every once in a while my hand will shake slightly. I have been taking Cymbalta since last summer (after coming off of Paxil). I have been diagnosed with anxiety, depression, panic disorder. It has happened while I have been actively doing something as well as when I am sitting still. As far as I know, no one in my family has ever had this issue or anything similar to it. I have not spoken with a physician yet. What could possibly be causing this?