I take another anti-convulsant called Neurontin. Tried Lyrica a while ago, but that gave me a bad migraine as soon as it started to work. Also, I took it after I had just eaten (I was full) and I got this sensation in my stomach as if I hadn't eaten for days, I just had to eat (again) and could have eaten just about anything! No way! I can't gain weight with my bad knees. I went back to Neurontin a day later. Why change something that works?

Anti-convulsants help with the nerve pain related to RSD.