Mucinex, Mucinex DM Expectorant And Cough Suppressant 12 Hour, 500 TabletsProduct Description Mucinex DM is a powerful medication designed to relieve coughs and help control mucus. It contains two active ingredients: guaifenesin, an expectorant that helps loosen mucus in the airways; and dextromethorphan, a cough suppressant that helps reduce the urge to cough. This combination provides effective relief for cough associated with common colds and bronchial irritation. Mucinex DM is suitable for various conditions that can