I always have severe issues quitting antipsychotics cold turkey. When I quit haldol cold turkey I had severe insomnia, went manic/psychotic, almost died, ended up in the hospital. Even now I have withdrawals just before my injection. Headache, vomiting, diarrhea, tremors, and that's just a couple days. I'm expecting rebound psychosis/mania as always happens when I quit APs.