What Is Guaifenesin?

Guaifenesin is an active ingredient in many cold and cough products, including Mucinex® and Robitussin®. As an expectorant, this medication works by loosening phlegm and other bronchial secretions, which makes it easier to "cough them up." This drug also has been used in an off-label fashion to help women become pregnant.
While most people tolerate guaifenesin well and do not experience any problems, side effects are possible, such as drowsiness, dizziness, and nausea. In addition, this medication is not suitable for everyone. People with asthma, COPD, and other breathing conditions should talk to their healthcare provider before taking it.
(Click Guaifenesin to read the complete article on this drug, which explores in greater detail how it works, safety precautions to be aware of, what to do in case of overdose, and more.)
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