non-weight gain meds for schizoaffective disorder

which medication helps schizoaffective disorder with least symptoms and does not cause weight gain?

[drifter0213]

everyone responds differrently to meds what might work for you might not be what works for me my doctor said that all the meds now causes weight gain

[drifter0213]

side effects may be inevitable too

[ILADVOCATE]

  The antipsychotics in the class that Abilify Fanapt and Saphris are have the least potential of weight gain although it does occur but each person responds differently to each medication. As regards side effects it depends on the specific medication and side effect and how a person responds to it as well.