ibromyalgia
"I was diagnosed at 20 and put on muscle relaxers and pain killers that did nothing more than immobilize me.  I read about the guaifenesin treatment and asked my doctor for a prescription.  I started at 1200mg extended release 2x daily.  FINALLY I had my life back.  When Mucinex took away the generic option, I dropped to 600mg 2x daily, and it still does the trick.  12 years later, I still swear by it. I have occasional set backs, but I always bounce back within a week."