I read some interesting research that i hope will be of help and relief to someone. Apparently those of us with fibro have difficulty excreting phosphates(the worst is soda. Stop.)and a daily Mucinex has an active ingredient in it(I forget the name) that clears phosphates and helps offer relief to fibro sufferers. I tried it and it helped tremendously. I was a soda junkie and i stopped, took the Mucinex and what a difference. if you are a big soda drinker you will probably experience the worst headache of your life(I did). Take two Mucinex for a few weeks then just take one. Now, I had a case of flu and started drinking Sprite for my stomach and i really notice the difference. Back to no sodas. Good luck, I hope this will be of help to someone.