I had cervical ADR on Dec. 2. I don't see my surgeon again until Dec. 16, and I think I'm doing OK recovery-wise. BUT, I am still having terrible spasms in my shoulder and arm. I am on Robaxin 500 mg 2X daily for a muscle relaxer, as well as Norco for pain. I have left a message with my surgeon's office to ask for another muscle relaxer. Has anyone else been on Robaxin and found it not to be very effective? I am only sleeping about 2 hours at a time and I know a good night's rest will help in my recovery.