I have severe dysautonomia (or autonomic neuropathy) secondary to Sjogren's. I take multiple meds and have a pacemaker.

I can tell you that morphine (any narcotic really) can, and will, make autonomic symptoms worse...like the difficulty urinating, delayed stomach emptying, etc. But I also understand the need for pain mgmt. Although my dysautonomia started long before I got considerable pain from PN, I now have no choice but the treat the pain. Luckily only a few minor adjustments in meds were necessary. It is possible to manage both, but will take a little patience...and some persistence with the doctors.

Has he been worked up for POTS with tilt table test? With the added autonomic problems on top of PN, it might not be a bad idea to start exploring the cause of the PN...and now AN. This should include autoimmune testing, B12, and of course diabetes (GTT). What may have been explored 8 years ago (and nothing found) might now be ready to present itself, so some tests should be repeated.