Which of the following is NOT a use for decongestants?

Decongestants are primarily used to relieve nasal congestion by narrowing blood vessels in the nose, which reduces swelling and congestion. This makes them effective for treating symptoms related to conditions such as allergies, colds, and sinus infections.

While some may think that decongestants could have an impact on chest congestion, their primary action is not aimed at the lower respiratory system. They do not effectively relieve lung or chest congestion, which is usually addressed through other types of medications, such as expectorants or mucolytics, that help loosen mucus in the chest.

Promoting sleep is not a function of decongestants, as these medications often have stimulant effects that may actually keep individuals awake rather than helping them to sleep. Thus, it is evident that the use for promoting sleep is not aligned with the intended purpose of decongestants. The choice related to reducing lung congestion is similarly incorrect, as decongestants do not address lower respiratory tract congestion directly. Therefore, the correct answer highlights that promoting sleep is not a recognized use for decongestants.