I took all the research I could find to my pain clinic and said I want to try this. And they let me. It took 5 weeks to work and then.... it was incredible change. I could get up and feel better and less pain. I occasionally have to go off of it for things like oral surgery and removing a toenail because of the pain and needing opiates but I always go back.
Take in the research let them see you did your homework. They will then have to send the script to a compounding pharmacy and then you can pick up or they mail to you. Start at 1.5 and work up to 3.0 or 4.5. Chopra talks a lot about LDN in on of his lectures on Youtube.
CRPSiagnosis & Management - YouTube
34:00 mins he speaks about LDN. Very long lecture but very informative and has helped me tremendously advocate for myself.
Goodluck. And always advocate for what you want! It is your body!