For me, the higher the dose, the more chance it has to make me drowsy. I've been taking muscle relaxers for a long time though and I need some pretty high doses for it to work usually.
You're probably gonna start at a low dose and should be okay. Usually, if I get any of the side effects, I just get a little dizzy at first.
That's great news about the neuro appt! When do you see the regular doc?