Thankfully I only get allodynia if I have slightly more reta than usual. I have done a fair bit of research on what may help nerve pain as I have permanent cold and mildly painful toes, plus a bit of parasthesia from what I assume is an obesity caused peripheral neuropathy. PEA or palmitoylethanolamide is available from amazon and has a very large number of good quality human trials demonstrating it's effectiveness for nerve type pain and other pain types. Also alpha lipoic acid has fairly good evidence supporting its effectiveness as well for peripheral neuropathy pain.
If it is pretty annoying and stopping Tirzepatide for a while or lowering the dose is not a good option then either of these options are safe, reasonably cheap and probably as effective as any prescription medication ( at least PEA ) for that problem.
It could be worth considering swapping to semaglutide, at lower doses ( under 2.4mg/w ) skin sensation abnormalities were not common, but were very common in the much higher dose trials 9.6-16mg, Pretty sure it was more common with reta than tirzepatide.
The only vitamin deficiency that commonly causes those symptoms is vitamin b12 deficiency, but too much b6 or pyridoxine is a fairly common cause of neuropathy , anything above 50mg a day is a bad idea, less than 25 is probably safe.
