A drug used to relieve a cough is called an _______.

A drug that is specifically used to relieve a cough is classified as an antitussive. Antitussives work by suppressing the cough reflex, which is particularly useful in cases where coughing is unproductive and causes discomfort. This class of medication is commonly used to help manage symptoms associated with colds, flu, and other respiratory conditions where a cough is present.

In contrast, antipyretics are used to reduce fever, expectorants are intended to help clear mucus from the airways by thinning it, and decongestants serve to relieve nasal congestion by reducing swelling in the nasal passages. While all these medications have their distinct roles in treating respiratory ailments, it is antitussives that specifically target the symptom of coughing.