I'm going to give you the benefit of the doubt here an assume you've never been on an antipsychotic. If you were hungry would you eat to sate that hunger? My guess is yes. It's something powerful in your brain and if you don't eat you will feel hungry indefinitely. I walk two miles a day and I still gained ten pounds on antipsychotics. They make you hungry beyond whatever caloric need that you have. Some people gain 80 pounds in a couple of months...these are powerful drugs that people take to avoid constant torment.