what does an expectorant do
Shares & Saves. Save. An expectorant is a type of medication that's used to loosen mucus in the lungs, throat and bronchi. It also makes it easier for you to expel the mucus when you cough. Expectorants are most often used in combination with over-the-counter or prescription medications that treat common illnesses.hares & Saves. Save. An expectorant is a type of medication that's used to loosen mucus in the lungs, throat and bronchi. It also makes it easier for you to expel the mucus when you cough. Expectorants are most often used in combination with over-the-counter or prescription medications that treat common illnesses.