Guaifenesin : an old generic medication

 Guaifenesin : an old generic medication
Because GUAIFENESIN has no more patent protection, being an old generic medication and an over-the-counter drug, no pharmaceutical company will bear the expense (evaluated at $ 800 M) of a large clinical double-blind trials necessary for FDA approval of GUAIFENESIN's new use for fibromyalgia (it is an already FDA-approved medication since 1952 as expectorant).
Besides the above, one should be interested to think over what is featured on the cover of Lancet Volume 366 Number 9480, July 9-15, 2005: "If everything has to be double-blinded, randomized, and evidence-base, where does that leave new ideas?"
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