I have mild PN in my hands which is possibly a relic of when I used to abuse alcohol.

I have been taking taurine (1 gram/day) for a couple of months. It has helped with my tinnitus and I have also noticed some improvement in my PN.

There is some evidence that taurine can help with diabetic PN Taurine for painful diabetic neuropathy - Neuropathische pijn.

More generally, this link (courtesy of mrsD) is worth checking out for information about taurine The Forgotten Longevity Benefits of Taurine - Life Extension.