Are there any anti depressants or mood stabilizers that don't cause you to gain weight?

Yes: It differs for each patient. Wellbutrin can be helpful for overweight depressed patients who desire to lose weight. Topamax (topiramate) can impact appetite. Lexapro is overall considered weight neutral. However, each person responds differently to medications. You may not have weight gain with any antidepressants or mood stabilizer or you could with all of them.