never heard of epidurals for diabetic neuropathy.
Ive read recently, ( and more articles are being published on this topic...led by Doohee lee), that tarsal tunnel syndrome may be responsible for most of the symptoms of peripheral diabetic neuropathy, and that surgical decompression may be the way to go.
Since reviewing the litterature on this possible paradigm shift, ive added in my treatment algorithm , for patients that fail to get relief from neuropathic agents ( ill try various types first) , an ultrasound exploration for any signs of entrapment neuropathy , followed by a diagnostic and therapeutic xylocaine-cortisone injection. If they respond well, but it doesnt last, i send them off to a neurosurgeon for exploration and nerve release.