My husband takes gabapentin for anxiety. He's also on other meds for depression and ADD (Wellbutrin, Pristiq) and has seen a huge difference with the anxiety since adding the gabapentin. I was also on it for a while a long time ago and when I stopped it, my anxiety went through the roof.

I can't really attest to the increased appetite, but my husband says his has actually gone down since he began taking the med. I know when I'm anxious I can't eat, so maybe this is just a normal reaction to not being anxious anymore? I hope it works for you.