Compare to Robitussin Cough Plus Chest Congestion DM active ingredients. Equate Tussin Cough and Chest Congestion DM provides relief by targeting the source of your cough. Each dose pairs dextromethorphan HBr 20 mg, a cough suppressant, with guaifenesin 200 mg, an expectorant, to provide powerful cough and chest congestion relief. This non-drowsy cough syrup is an effective way to loosen mucus and relieve minor throat and bronchial irritation that may occur with a cold. In peak cold season, trust this liquid cold medicine in pleasant raspberry flavor to control your cough. The DM formula is reliable and effective at relieving cough, chest congestion and mucus. Alcohol and gluten free. Dosage cup included. For ages 12 and over.