An expectorant is given to promote the expulsion of mucus from the respiratory tract. This is true.
Expectorants keep your airway lubricated. This helps to loosen the mucus and thin the secretions in your airway. Expectorants make your cough more productive by loosening the mucus. This allows you to cough up mucus and clear your throat more effectively.
Expectorants thin the mucus and make the secretions in the airways thinner. Expectorants make it easier for a person to cough up phlegm and clear their throat by loosening up the mucus in these ways. Expectorants work by irritating the gastric vagal receptors that stimulate respiratory tract fluid, increasing the volume but decreasing the viscosity of respiratory tract secretions.
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