Asthalin 100 mcg Inhaler 200 Mdi is used to treat asthma and chronic obstructive pulmonary disease (COPD). Asthalin 100 mcg Inhaler 200 Mdi helps relieve symptoms like coughing, wheezing and shortness of breath. Asthma is a breathing problem in which airways narrow, swell and produce extra mucus, leading to difficulty breathing. COPD is a group of lung diseases with emphysema (shortness of breath) and chronic bronchitis (inflammation of the lining of the bronchial tubes).