Hi mandy and welcome to the forum.
Sometimes a small does of anti-depressants are used to alleviate the pain associated with neuropathy. Amitriptylene is often used.
If the pain is so severe that he cannot stand it and it is interfering with his quality of life then he needs to go back to his G.P. for something stronger.
There are people on the forum who take prescription only pain killers for this complaint and I hope they will post with their experiences.