Neurontin really didn't help me, either. That's why I stopped taking it......well, that and it caused me to gain weight.
I haven't found anything that truly relieves the pain. I guess I've just become accustomed to it. That or I have a high pain tolerance. My right hand has been like this for so long I've just become used to it.
One thing that seems to work for some people is one of those braces like you wear for carpal tunnel. It keeps your hand from clinching up and your fingers from curling under. When my hand first was like this I used it but eventually it got cumbersome so I quit wearing it.
I sympathize with you.....I know it hurts. Let us know what your regular neuro prescribes for you. I've tried Darvocet but it did nothing except keep me awake.