I have CRPS of my left arm. Occurred after a fall, then rotator cuff surgery.. I was taking Gabapentin and currently switching over to Lyrica. My fall was over two years ago, so this has been going on a long time. Everyone is different, so treatment is so individualized. What level of pain do you have? Once I got up to 3600mg a day of Gabapentin, my pain level went from a 7 to a 6. I started PT again with the lower pain level, and it went back to a 7. I have had many side effects from Gabapentin, so hoping Lyrica has less. You are the first person that I have conversed with that has CRPS in an arm. Most seem to have it in their legs/feet. My pain specialist suggested a Spinal Cord Stimulator for me. However after doing a lot of research on the success for CRPS of the arm, very little positive data could be found. I also am a breast cancer survivor and with the Spinal Cord Stimulator, you can’t have MRIs of your torso. I empathize with you and would like to see how your journey progresses. Best of luck and stay in touch if you like.