Lithium caused weight gain for me. I have an ED anorexia history so I can relate. I've taken Abilify, Geodon and Seroquel ... Geodon I lost weight. Abilify and Seroquel were weight neutral for me. My pdoc has mentioned schizoaffective to me - but said treatment for my bipolar 1 is the same treatment if schizoaffective med-wise. Thinking of you. xoxo