Welcome to HCM
We understand your concerns
I went through your description. I suggest you to visit a psychological counsellor before starting the medication, though I am not questioning the wisdom of the psychiatrist
Why your child is misbehaving? You should find out. He may not tell you. But may tell to a third person if asked properly. Psychological counselors are trained to do that. There may be some problem in the developmental way of the child which needs to find out. Eradicating the problem should set him in the right path. You can contact me over phone through healthcaremagic and I shall help you.
Hope this clears your doubts. Available for further clarifications.