When I took Geodon, I too had no appetite, which was a big switch from Zyprexa.  One thing you might consider is eating several small meals a day, if you fill up quickly, instead of 3 regular meals.  That doesn't exactly pertain to appetite but perhaps would help keep your weight stable.  I do know that having no appetite can be as frustrating as having too much.  People think they would like to have no appetite in order to lose weight, but you can lose too much.  If you are on an antidepressant, you might consider switching to Remeron which is an antidepressant that also acts as an appetite stimulant.  Worked for my brother.   carolyn