Gil, I also have severe chest pains which are caused by muscle spasms in my back - to the point I would wake up screaming at night. My dr just started me on a very strong muscle relaxer which I take before going to bed. I have had two nights of 8 hours of sleep in a row - that is the first time in 3 yrs I've been able to do that. The only problem I have had is that I sleep so soundly I cant wake up to take my sinemet at 2am, so I am pretty off when I do wake up. tex