For SSRI - prozac is weight neutral and some ppl lose weight
For an Anti-Psychotic - Geodon has stats of a 2lb weight loss
I've read that Abilify can be weight neutral, but it just depends on your brain chemistry. I gained about 60lbs over the past year on abilify and it is impossible to get the weight off so I quit taking it
I think Lamictal is also weight neutral