Looking for sleep medication without weight gain side effect

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.

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.

Trazodone has been most effective without causing weight gain?