I have had a lot of health conditions seperate to the rsd and spread of rsd too. I don't have good pain control through meds but have heard this happening to others. I guess for myself when there is a side effect or a possible problem with a med or treatment I try to weigh the positive vs negative. There sometimes will be no perfect. Usually with most conditions there is a sign that is something wrong and I would think most conditions would not be covered completly by a med but of course I could be wrong. Did you tell your doctor about the concerns you have of this because they may be able to comfort you that really the chances are slim again to this happening. I hope you feel better