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Expectorants are medications that break apart mucus and make it easier to cough up and expel from your body. There are many over-the-counter expectorants available at drug stores, but you can go to your doctor for a prescription as well.
5 Reviews. 5 Reviews. Mucinex DM is a cough medicine that contains dextromethorphan, a cough suppressant, and guaifenesin, an expectorant that helps loosen mucus in your throat and lungs.This combination of two drugs helps to loosen mucus or phlegm and thin out bronchial secretions, making coughs more productive. Reviews. 5 Reviews. Mucinex DM is a cough medicine that contains dextromethorphan, a cough suppressant, and guaifenesin, an expectorant that helps loosen mucus in your throat and lungs.