What is one of the actions of expectorants in the respiratory system?

Expectorants are pharmacological agents designed to enhance the clearance of mucus and secretions from the airways. Their primary action involves thinning mucus, which decreases its viscosity and makes it easier to expel through coughing. This action improves mucociliary clearance and helps alleviate symptoms associated with respiratory conditions, such as bronchitis and sinusitis, where mucus buildup can obstruct airflow and promote coughing.

By thinning the mucus, expectorants facilitate its movement throughout the respiratory tract, allowing for more effective clearance and promotion of healthier breathing patterns. This can lead to improved comfort for the patient and help prevent complications associated with stagnant mucus in the lungs.