I was put on ms contin about 18 months ago by the pain management clinic in Loma Linda CA for chronic pain associated with degenerative disc desease c3-c7, forminal stenosis, radiopathy, etc.... worked well to manage my pain at 30 mg twice a day. I quite my job in July 08 due to my chronic pain. Went to my internist asked to get of the ms and he told me to just delete to pm dose. Big mistake, thru me in to withdrawal, insomnia, body jerks, sweats, chills. Oh what fun.