I've never taken meds to help with pain but I've taken niacinamide(nonflushing niacin - B3). This worked for me but I think my nerve pain is not as strong as others. A friend with Raynaud's said that it helped her hands. This was not a quick fix though. It was 3 days before I saw any relief.
Do a google search to check for med interactions, there are some. I hope this info helps, I know pain can be more debilitating than weakness.