Cough Kum Syrup is used to treat cough. It thins mucus in the lungs, windpipe, and nose to make coughing easier. Additionally, it soothes irritated throats, watery eyes, and runny noses. Cough Kum Syrup is a combination of four medicines: ammonium chloride, bromhexine,and menthol which relieve wet cough. Ammonium chloride is an expectorant that works by decreasing the stickiness of airway secretions and helps in their removal from the airways.