Kid of mine did great on risperidon at first. Though side effects were not funny. After a few months she got more and more tired, sleeping most of the day. So they tried other meds. She also was on aripiprazol for a very short time. That was utter hell. It increased her irritability massively. She seemed to be in aggressive meltdown 24/7 and ended up totally exhausted. There are several clues kid has a different type of metabolism, it is in her status that no psychopharmaca can be prescribed, unless she gets a biogenetic test first.
A friend of hers made a change from risperidon to aripiprazol too, in the hope it would help with weight. For her there was hardly a difference in the effects of both medications. They did the job they were supposed to do. There was no difference in effect on weight and wanting to eat either.