Risperdal and wellbutrin

my 16 and a half year old son was put on this medication because of his temper; however he sleeps excessively, does not have a problem with libido and is still as angry as he was before being put on this medication. His diagnosis had something to do with his oppositional attitude?? But isn't that fairly normal as well as common for a teenager who does not always get his way?? My ex husband had him put on this medication so that he would be easier to deal with. I want to get my son off of this drug. He is still taking wellbutrin which I dont believe has the same adverse long term affects. What do you think?? A concerned mom

rapid weight gain,inability to concentrate,still no sex drive,leg pains and muscle weakness. from respirdal.it did clear up psychosis (schizophrenia) i also take wellbutrin for depression.