This pain you have, Blaine, is far beyond a typical PN.

Yours is acute by far and most disabling. I met a woman once who was having a neuro inject her neck for some neck pain...an epidural of some type. He hit an arteriovenous malformation which he did not know was there, and she ended up in emergency surgery to save her spine. Her pain was treated with a similar dose of Percocet and some other drugs like yours. (she also used Lidoderms). Eventually she had to have a pain pump inserted.

I am wondering if you were evaluated for RSD? also called CRPS? Do you have color changes with your pain in the arms?
The sweating occurs in RSD too.


http://neurotalk.psychcentral.com/forum21.html

But it can also come from the Percocet. (and Cymbalta).
Cymbalta also can raise blood pressure. Ketamine and lidocaine IV infusions are sometimes used for RSD patients. If you read that forum and post there, some of those receiving these infusions may answer.

I hope you find some answers soon.