Duphill M 400mg/10mg Tablet is used to treat and prevent asthma .Duphill M 400mg/10mg Tablet can help prevent the onset of an asthma attack if it is taken before exercise or exposure to some “triggers” that include house dust, pollen, pets and cigarette smoke. It also helps the airways in your lungs stay open. It relaxes the muscles of these airways. This makes it easier for air to get in and out. This medicine will allow you to exercise more freely without worrying about getting symptoms such as wheezing, coughing and shortness of breath. It allows you to live your life more freely without worrying so much about things that set off your symptoms.