I'm on 400 mg of Gabapentin twice a day for anxiety, and I've notice only a *teeny* bit of little spasms in my legs, but I don't know if that's what you're talking about or not. It doesn't happen hardly ever, so to me it's not a big thing. I do know that Gabapentin can be taken also for joint pain, but I'm not too sure about RLS or shaking all the time. That actually sounds like a side affect... but I could be mistaken.