Guaifenesin
"I've been taking Guaifenesin for 18 months, along with following all of the guidelines written by Dr. R. Paul St. Amand in his book, "What Your Doctor May Not Tell You About Fibromyalgia".  Before I started the Guaifenesin Protocol, I was in so much pain, and had so much fatigue that I was in bed much of the time.  Slowly and steadily, I am getting my life back.  My pain is much better.  The fatigue still comes and goes, but gets better each month.  Some of my other Fibro symptoms are completely gone. 
It is VERY IMPORTANT to follow the protocol as written by Dr. St. Amand, especially avoiding plant products (salicylates) on your skin.  Just taking a Guaifenesin pill will not make you better.  Do your research--you can do this!"