My Pain Management doctor put me on Zonegran. I had tried neurontin, elavil and depakote without any luck. The Zonegran has done fairly well for my leg pain however, I can not stay awake at all on it. I take it at bedtime and am knocked out within 20-30 minutes. It's good for a 12 hour sleep. I will have to talk to her about some of the drugs you have mentioned here.