My son is 13 years old. He is on Ritalin LA, Oleanz 5, Nuzak and Lithium. I think the doctors do not know what is really wrong and are experimenting on him? Recently he is telling lies, stealing and defiant. He does get agitated at times and shows aggression and has become very impatient. Also, he struggles to sleep. He was much better before he was put on all these medications. What could be wrong?