I was on neurontin for several months a while back. It did not help my pain too much...I had a much better response to the Lyrica. The biggest side effect was that it knocked me out and it would come on very suddenly sometimes...like I would blink and be asleep...even if I was standing up. I tended to zone out very quickly and could not concentrate on anything without taking a nap (not good when you are in a meeting or driving a car). I think because of the strong side effects I experienced I never got up to a proper dose that would have helped with the pain because after a couple of months I went off it and switched back to Lyrica. I did also gain about 20lbs after I went on it (same thing happened with the Lyrica when I first started that).