Phlegm is mucus that can build up in your lungs and cause a cough ... an ingredient called guaifenesin, which may help break up the mucus in your chest. Common brands include Mucinex and Robitussin.

Afrin and Flonase are over-the-counter nasal sprays. Learn how they compare in effectiveness, side effects, and safety to ...

Avoid taking Dayquil during pregnancy. It contains the decongestant phenylephrine, which may not be safe for expecting moms.

Moist air inhaled into your air passages loosens the mucus in your lungs, making it easier to cough up ... the same active ingredient is synthetically produced for medications. Over-the-Counter (OTC) ...