Thank you, Ed Norton.
I was wondering about this issue when I rapidly gained a significant amount of weight in a short amount of time immediately after my psychiatrist tripled my dose. I did a small amount of superficial research and discovered that one of the side effects was, indeed, rapid weight gain. But since he did not mention this, nor have anyone else I know on Gabapentin mention weight gain I wanted to post a thread on here.
As with all medications, I suppose we all experience different side effects, but sometimes we experience the same, too.
I'm happy to know you did not experience this. :)