The best way to relieve congestion is to treat the inflammation that causes it. Advil Cold & Sinus addresses this problem with an effective decongestant, called pseudoephedrine. Pseudoephedrine works by releasing norepinephrine, a form of adrenaline, which affects the tiny muscles lining the walls of blood vessels, causing them to constrict or close. This process serves to re-open vital airways and allows the cold-sufferer to breathe easier. 50 DOSES
