Formoflo 100 Transcaps 30's is a respiratory medication, primarily used to treat and prevent asthma and chronic obstructive pulmonary diseases (COPD) like bronchitis (inflammation of the lining of your bronchial tubes) and emphysema (shortness of breath). Asthma is a chronic (long-term) respiratory condition in which airways narrow, swell and produce extra mucus, leading to difficulty breathing. COPD is a group of lung diseases that causes obstructed airflow from the lungs.