I have small fibre neuropathy which is worsened by some foods, wheat, and some medications, e.g. Lamictol. My usual med is Lyrica 100 + 100 at supper, but I discovered by chance that Benadryl is a pretty good if the pain is keeping me awake. Usually 25 mg is enough to take the edge off so I can get to sleep, but occasionally I need 50mg. Drawback is that it may leave you a bit groggy in the morning.