My husband was taken off haloperidol, what kinds of side effects can we expect?

No withdrawal... The side effects of coming off of Haldol (haloperidol) are mostly the return of the symptoms that were being treated. However, rapidly taking someone off of Haldol (haloperidol) can cause dyskinesia or involuntary muscle movements, mostly of the face but can be in the arms and legs. The other thing could be insomnia if the Haldol (haloperidol) was helping him sleep.