Source:http://linkedlifedata.com/resource/umls/id/C0006280
MSH: Agents that cause an increase in the expansion of a bronchus or bronchial tubes.,CSP: agent that causes an expansion of the lumen of a bronchus or bronchiole.,NCI: A type of drug that causes small airways in the lungs to open up. Bronchodilators are inhaled and are used to treat breathing disorders, such as asthma or emphysema.