Is there anything I can do to control weight gain and water retention from gabapentin?

It is not clear for what problem, you are taking Gabapentin?,Please reply so as to intimate/suggest accordingly.
Hope for the best.

I found it to be a problem with gabapentin, Cymbalta, and Lyrica. I'm hearing (here on this site actually) that Savella is much better at not making one vulnerable to gaining weight. I know the name brand meds are much more expensive, but I did find quite a difference from being on gabapentin to being on Lyrica. When I was on gabapentin I had difficulty expressing words - they would be on the tip of my tongue, but I couldn't say them for the life of me. My family was always playing 20 questions trying to figure out what I was talking about. I had no problems like this with Lyrica. I am very heavy, and it's a toss as to what all is causing it: pain meds, Lyrica, being sedentary, diabetic - you name it. I also have swelling in my legs and hands, which could be the Lyrica, or could be from being sedentary. Lot of side effects for these meds, but they do make life much easier. At least in the short run. Doubt if I've been helpful, but just wanted to try. Best wishes -