I have been taking Gauifenesin for 5 years and it has chainged my life. I got no help from my Doctor. I suffered from excruciating muscle and joint pain. I could hardly make it through the work day. Fatigue ruled my life. Then I read the book "What your Dr. may not tell you about Fibromyalgia". I now have my life back! I jog 5 miles almost every day. The joint and muscle sorness is gone. Thank God for Gauifenesin!