[steve86]

That reads like an infomercial (understatement), but I can confirm that guaifenesin has been helpful in the case of my wife's fibromyalgia. It is also fairly inexpensive if you buy the generic #100 bottles (around 38 cents a tablet, I believe it is). These are the exact same physical tablets as the Guaifenesin Extended-Release 600 mg brand.

[steve86]

I meant same as the Mucinex brand.

[MikeHu]

There is a feeling among many that the quick-acting tablets are actually preferable because the patented process to make the tablets slow-release may render it indigestible with people who have digestive difficulties, as many who have FM do.

So the quick-acting tablets are available for around $10; one chiropractor even suggested that the reason the study failed to prove the guaifenesin cure was because they were using the extended release tablets, and he found in his own patients, many for whom extended release tablets did not work, quick-acting does. When a tablet is indigestible, it may cause digestive upset; that doesn't seem to be a problem with quick-acting tablets.