Mucinex Dm, Expectorant And Cough Suppressant 12 Hour Extended-Release Maximum Strength, 28 TabsProduct Description Mucinex DM is designed to help you manage cough and chest congestion. It's formulated to provide relief for up to 12 hours, helping you breathe easier. This product combines a cough suppressant and an expectorant for effective relief. It's a maximum strength formula that works to loosen mucus and calm coughs. Product Benefits Helps Manage Cough. Supports Relief From Chest Congestion. Ingredients Active Ingredients: Dextromethorphan