The Prozac is causing the tics, or it is a freak coincidence. When I started taking Prozac when I was 19, that’s when the tics started. When my dose was increased, the tics worsened and became debilitating and unbearable. When my dose was decreased, the tics became less severe and were manageable. I don’t meet the diagnostic criteria for any tic disorders in the DSM-5. I have found a single case study of someone developing tics from Prozac.