G.♣.
Did you call your pediatrician or psychologist/psychiatrist? I wouldn't do anything without checking with your son's doctor first.
We have requested a med change for our son. We met with his pediatrician (the one who actually prescribes his meds) and let her know our concerns. She will discuss our concerns with our son's psychologist and see what he recommends. It really is important for you to talk to your son's doctor(s) about this. I wouldn't mess around with this without talking to them.