Hi Angie,
I'm sorry to hear that your other half is suffering so much and feeling so helpless.

I think most of us truly empathize with you both, as there never seem to be any quick or easy answers for restoring health, or even relieving pain, unfortunately.
I have peripheral neuropathy, too, but nowhere near as painful as what you are describing that he experiences. Do you mind if I ask what other medications/supplements he is taking, and at what doses? This information might help us get a better idea of what suggestions we might be able to make to try to help you all.
And welcome! I am new here too, but I'm a long time sufferer who came here seeking my own answers. I hope I can help in some way.
Bren