I was on an antipsychotic for a brief time after a mental breakdown (Severe OCD, anxiety and magical thinking misdiagnosed as pyschosis). I managed to stay slim and not overeat, but holy shit it was hell. I was so hungry I felt sick, but eating did nothing to quell it. I could've eaten myself to vomiting and still felt like I was about to collaspe from hunger pain. I would lie on the floor crying from how hungry I was. And I'm a recovering anorexic who has gone days without food, so it takes a lot to get me to collaspe from hunger. Don't even mention the brain fog, dear God. I was alright during the day, but by the time 6 pm rolled around, I was a total zombie. Moral of story: Do not give antipyschotics to those who don't need them. Because if you aren't nuts already, those pills will drive you crazy.