Hubby had sympathetic nerve blocks and Calcium channel blockers (he was severly burnt with acid and other chemicals) - At first they worked SUPER although he was quite numb and had to be brought home in a wheel chair. They eventually started working (time wise) less and less - After 26/27 of them and only working for about 12 hours they decided to discontinue - Also the Dr wanted him off them for a while.

I do have to say that they WORKED - As he was able to get through massage and regular RSD therapy and it seemed to help with mobility in the end.

Hubby does walk with a brace he has muscle loss/atrophy in his leg (it's 1/2 the size of the other) and will always need a brace for support - BUT over all his RSD is "managable" in his leg - he has good days and bad but he does not need the heavy meds required by some.