Trazodone has been most effective without causing weight gain?

Hydroxyzine is an antihistamine prescribed as an anxiolytic, it totally knocks me out, don't know if it has weight gain as a side effect. My husband takes topiramate to counteract the weight gain effects of his other medications, and he lost over 100 pounds. He works out a lot also, but he always did, before the topiramate he couldn't lose weight. It seriously controls his appetite.

Also bupropion is an antidepressant that can help with weight loss, but personally I couldn't handle that dosage. There's an adjustment period you have to get through, and it was unbearable for me, so I'm on a lower dose just for the antidepressant effect.