Used as a cough suppressant to relieve dry, hacking coughs caused by minor throat and bronchial irritation, often associated with colds or inhaled irritants. It works by numbing the throat and lungs, reducing the cough reflex. Typically prescribed when a persistent cough interferes with sleep or daily activities. Not intended for chronic coughs related to smoking, asthma, or emphysema unless directed by a doctor. Often used short-term and available in oral capsule form that should be swallowed whole to avoid numbing of the mouth and risk of choking.