A drug that increases cough output is called a(n) ____________.

A drug that increases cough output is known as an expectorant. Expectorants work by thinning the mucus in the airways, making it easier for the body to expel phlegm and mucus through coughing. This action helps to clear the respiratory passages, which is particularly beneficial when dealing with conditions that cause congestion, such as a cold or bronchitis. By promoting the productive cough, expectorants assist in the body’s natural processes to clear the respiratory tract and can lead to improved breathing and reduced discomfort.

In contrast, decongestants aim to relieve nasal congestion by shrinking swollen nasal tissues, while antitussives suppress the cough reflex, thereby reducing the urge to cough. Antipyretics are used to lower fever. Each of these functions serves a different purpose in the management of respiratory symptoms, but expectorants specifically enhance the body's ability to clear mucus through increased cough production.