Helps Loosen Phlegm (Mucus) And Thin Bronchial Secretions To Rid The Bronchial Passageways Of Bothersome Mucus And Make Coughs More Productive. Relieves Chest Congestion. 12 Hour Relief. Bi-Layer Tablets.Active Ingredients: (In Each Extended-Release Bi-Layer Tablet); Guaifenesin 600 Mg