Coming off of an anti-psychotic can induce psychosis, even if you have never had it before. Be careful in reducing dosages, for this can bring on withdrawal.

Ive been reducing mine by 10% every two weeks since July, and i am down to 1.68mg of risperidone from 3mg. I might have a couple of more years left of reducing dosage, because i am making cuts off the reduced dosage. I learned that from here:Surviving Antidepressants
They help with withdrawal from any medicaton.

good luck