Hi, vitamin B6 and B12 are good for neuropathic pain.
http://en.wikipedia.org/wiki/Vitamin_B12
http://en.wikipedia.org/wiki/Vitamin_B6
But usually drugs like gabapentin, carbamazepine, amitrypline etc are prescribed for neuralgias.
Dr. Jacob Teitelbaum has written good information about treating neuropathy.
Effective Treatment for Neuropathic (Nerve) Pain
http://www.endfatigue-dev.com/health_articles_o-q/Pain-effective_treatment_neuropathic.html
Book Notes for "Pain Free 1-2-3"
Chapter 4: Focusing on Nerve Pain
http://www.endfatigue.com/book_notes/Pf123_chapter_4.html
I hope you'll find something to help.
Carol