An interesting pamphlet...
 

A 170 page pamphlet packed with information about is CRPS therapies is available free on the web -- you have to google "CRPS_I_Guidelines.pdf." It contains a LOT of information about therapies used specifically in Europe. A briefer version is availble as well if you google "CRPS_I_Guidelines_patient_version.pdf." It contains information about using DMSO cream and N-acetylcysteine.