Carbocisteine is a medication used to treat respiratory conditions characterised by excessive mucus production and congestion. It is classified as a mucolytic agent and works by thinning and loosening the mucus in the respiratory tract, making it easier to cough up and clear from the airways. This can help alleviate symptoms such as coughing, chest congestion, and difficulty breathing. Carbocisteine works as a mucolytic agent by altering the properties of mucus in the respiratory tract.