Breathe Better, Live Better! 🌬️ Clinically proven ingredients for effective cough and mucus management. Combines expectorant and cough suppressant for comprehensive care. Unique tablet design for immediate and extended relief. Enjoy up to 12 hours of uninterrupted relief. Thins & loosens mucus for effortless breathing. 12-hour extended release 600 mg Guaifenesin Cough control MUCINEX DM TABS E/R 600 MG is a powerful cough and mucus relief solution featuring a bi-layer tablet that combines 600 mg of Guaifenesin to thin mucus and 30 mg of Dextromethorphan HBr to suppress cough, providing up to 12 hours of effective relief.