Kelly - I too have heard that is a side effect. I have only tried it for a week, 5 mg at night. It knocked me out so much and left me groggy and hungover the next day (including a hangover headache) that I won't take it anymore.

Is there something else that your dr can prescribe? I just discovered from I think mrsD on another thread, Salonpas. I had slept wrong one night and was having regular spasms in my neck and shoulder. I put one of those on and it worked great. I have not tried it on any spasms as I am only have tightness and slight pulling right now.