Venphylin-M Tablet SR is a combination of two medicines that can help prevent the onset of an asthma attack if it is taken before exercise or exposure to some âtriggersâ. These âtriggersâ may include house dust, pollen, pets, and cigarette smoke. This medicine relaxes the muscles of your airways which makes the air easier to get in and out. It will, therefore, allow you to exercise more freely without worrying about getting symptoms such as wheezing, coughing, and shortness of breath. This enables you to live your life more freely without worrying so much about things that set off your symptoms.