I hope you can research and make a decision. It is so hard with CRPS because there is no road to follow for pain relief, it is always a "try it and see what happens" Good Luck to you. I have read good things about both Ketamine and epidurals. My daughter had both and had some relief with K and had a 5 day epidural, she was pain free for the 5 days in hospital and 3 days after. She is facing the same thing as you as the PM doc wants her to decide to do one of the treatments again. It is never easy with CRPS. Good Luck!!!