A bronchodilator is a substance which enlarges the bronchi and the bronchioles which decreases resistance in the airway and allows free airflow. They are used in conditions such as chronic obstructive pulmonary disease, asthma, and other obstructive lung diseases.
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Inhaled Bronchodilators for Cystic Fibrosis
Review consists of details about inhaled drugs used to open the airways of those who suffer from cystic fibrosis and contains background information, objectives, and data collection methods. - Inhaled Bronchodilators for Cystic Fibrosis
http://www.cochrane.org/reviews/en/ab003428.html