Compare to the active ingredients in Robitussin® Cough + Chest Congestion DM. Tussin DM provides soothing action and targets the source of a cough, plus relieves congestion. Non-drowsy Tussin DM contains Dextromethorphan HBr, USP 20 mg and Guaifenesin, USP 200 mg to relieve cough and chest congestion/mucus. Cherry flavored. Alcohol-free and gluten-free. Dosage cup is included. For ages 12 and over.