I have experienced the same type of severe cramping for quite a few years-and I have only had CRPS since March 1. However, 18 months ago the neuropthy I have had since at least 2007 was finally diagnosed as CMT (Charcot-Marie-Tooth -a genetic hereditary motor and sensory neuropathy disease). No meds have helped the cramping, although lyrica did help with the pain/buzzing/zapping. I started taking Topamax for my migraine and that too has help with the CRPS to some degree (left foot, moved to right foot but not very bad). There have been times when my calf was sore for several days after cramping in the middle of the night. One time I remember crying in the bathroom when I could not stand my foot down to stop my calf from cramping. Gosh, I wish someone could come up with something that would STOP THIS!!