This medication operates at several different parts of your brain, and on several different receptor sites. That means, it has a very complex effect on your brain tissue, and from what you describe, it has a strong effect on that part of your brain that effects your sense of danger and your sense of well being. The chances are very strong that you can rebuild the natural chemical brain connections without the drug over time, but nobody can tell you how long that takes, so I can't tell you how long the "feeling bad" will last. If you feel strong enough, and if the other medications click in, it may not be very long, but only an experiment will give you the answer.
I was on respiradol when I was 10. I dont remember any kind of withdraw. But I do remember it making me feel like i was a zombie.
If your concerned trying tapering down more slowly.
I cannot wait for the 3rd Generation of Anti-Physcotics. I feel what I believe is schizophrenia coming to me this last couple years.