Mucinex is used to treat which symptom?

Mucinex, which contains the active ingredient guaifenesin, is primarily used to treat symptoms associated with congestion. By acting as an expectorant, Mucinex helps to thin and loosen mucus in the airways, making it easier to expel during coughing. This is particularly effective for individuals suffering from conditions like bronchitis, sinusitis, or other upper respiratory tract infections, where congestion and mucus buildup are prevalent.

While it might seem that Mucinex could address symptoms like coughing, its main function is to provide relief from the build-up of mucus that leads to congestion, enhancing airflow and easing respiratory discomfort. Understanding the primary action of guaifenesin is crucial for recognizing how it fits into the therapeutic management of respiratory symptoms. Thus, it is the medication's specific role in relieving congestion that anchors it as the correct answer in this context.