Expectorants work by increasing the amount of fluid in the respiratory tract and by increasing vagal-gastric reflex stimulation.

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Expectorants are medications that work by loosening and thinning mucus in the respiratory tract, making it easier to cough up. They do this by increasing the amount of fluid in the respiratory tract, which helps to break up the thick mucus. Additionally, they stimulate the vagal-gastric reflex, which can help to increase coughing and further facilitate the removal of mucus.

Expectorants Work by Increasing the Amount of Fluid in the Respiratory