It does help if you have the right doctor in your corner. I don't believe the med. is causing that rash. Did the doctor know for sure? If this medication seems to work, I suppose because of the pain I would continue to take it. Seek another doctor and ask by phone if they have any experience with RSD to begin with. I asked my own pain specialist one time what this disease is, and she didn't really understand it. (she deals with my PN). Maybe the forum here can suggest a doctor that is highly known in your area of the country. The proper help to keep you active with a good quality of life, is something a good doctor should help you to obtain. Guess work on his part isn't fair to you. He only guessed about the rash. I know others here will help you with some good ideas too. Have you tried a Ketamine cream or lotion? I do wish you all the best as you try to find the best possible care. ginnie