from drugs.com: Guaifenesin is an expectorant. It helps loosen congestion in your chest and throat.

Yes! I posted that on here a few months ago. It does work. My medicine cabinet has tons of generic Mucinex.

Go to Guaifenesin.com... Lots of good advice. About guaifenesin and Fibromyalgia!

Yup, red flag.

I only use it when the parathesia is unbearable. and i dont dare tell a DR I self medicate with it or on a routine basis. That's a red flag !!