Many antipsychotics affect your hunger- I do not know why. IME lower doses are more sedating (usually prescribed this way for sleep) and higher doses are better for controlling psychosis. I know seroquel when taken in higher doses can be better for psychosis then the low level prescribed for sleep. It also depends on the drug. I take Geodon and my doctor told me to eat a few crackers when I take it because it sort of "activates" it through digestion. Sure enough if I do not eat something with it, it definitely does not seem to work as well.