Adhd with autism. With autism gets cure.

Hello doctor my son was facing adhd with moderate autism he is now 5 nd half years he is under psychiatry doctor treatment.. at one n half years he is facing fits. He doesn't have any hearing problem..and therepy also continue from last 2 years he is under treatment.. initially we recommend neuro doctor but doesn't see any kind of improve but recently hardly 2 months we change doctor psychiatrist.. medicine doctor has given levipil 250 and sizodon 1mg .. he is very hyperactive and facing sleep problem .. hardly 4 to 5 hrs is sleep problem gets cure please suggest what should I do for proper sleep .. for physical excercise at home half n hr I am giving therepies.. but still he doesn't feel tired what should I do is adhd with autism gets cure ..