Compare to Mucinex DM active ingredients. Equate Mucus Relief DM pairs a cough suppressant with an expectorant to give you 12 hours of mucus relief. These extended-release tablets contain Guaifenesin and Dextromethorphan Hydrobromide , 600 mg/30 mg. Each dose helps loosen phlegm (mucus) to make coughs more productive, and also temporarily relieves cough due to minor throat and bronchial irritation as may occur with the common cold or inhaled irritants. This medicine also relieves the intensity of coughing and the impulse to cough to help you sleep. This product does not contain gluten. For adults and children 12 years and older.