IHH,
I've been on Neurontin for 3 years now, and I've definitely had a lot of side effects - metabolic changes, weight gain (not serious, but then again, who likes weight gain? ), dizziness, and sleep changes.

I've found that while my circulatory problems are constant, my pain isn't. In order to deal with that, I've been on as much as 3200 mg of Neurontin. Being young (like you, I'm only 21), I'm leary of becoming too used to my medicines. So, with my doctor's consent, I now modulate my doses for my pain. If I'm having a good week, I lessen my dose to as little as 300 mg per day (I don't usually get that low, but it happened, especially a few years ago). The trick is to only go up and down slowly - you can't go from 3200 one day to 300 the next.