Kaung Myat HtutApril 22, 20122min1370
Asthma is a serious health disorder characterized by coughing and wheezing and a general difficulty in breathing. It is often caused by chronic allergies. One way asthmatics control the problem is by inhaling so-called bronchodilating drugs that help clear the bronchial tubes. Most mechanical inhalers contain propellants, like Freon, or additives, like lactose, that aid […]