Maximum Strength Mucinex Fast-Max DM MAX is a Symptom Relief medicine for your Chest Congestion & Cough Symptoms. Maximum Strength Mucinex Fast-Max DM MAX helps relieve cough, thins and loosens mucus and relieves chest congestion. Mucinex is the #1 most trusted brand among doctors for cough and chest congestion symptoms for themselves and their families* and #1 Pharmacist Recommended Brand † . This product contains 6 Fluid Ounces. Use as directed, for Adults and Children 12 years of age and over. SYMPTOMS RELIEVED: Maximum Strength Mucinex Fast-Max DM MAX helps relieve cough, thins and loosens mucus and relieves chest congestion ACTIVE INGREDIENTS: Contains Dextromethorphan HBr - cough suppressant; Guaifenesin - expectorant Take only as Directed *IQVIA using ProVoice Survey, August 2020 † U.S. News & World Report/Pharmacy Times 2020-2021