t really cut it for me, but I found that pregabalin 150mg TID for 2 days before, and then for 5 days after the procedure, was very effective in controlling that kind of
neuropathic pain.
You mention NMDA-antagonists -- Have you tried Namenda (memantine)? It is an oral NMDA-antagonist. I used to take ketamine capsules, but they are compounded, not covered by Rx, and got too expensive for me to afford.
I recently had a low-dose ketamine infusion.