ANNA WRIGHT / SCIENCE PHOTO LIBRARY ANNA WRIGHT / SCIENCE PHOTO LIBRARY
Asthma inhaler. Artwork of an inhaler to treat an asthma attack. Asthma is a condition in which the small lung airways (bronchioles) constrict, making it difficult to breathe. This causes wheezing, coughing and breathlessness, and can be dangerous. The inhaler releases a bronchodilator drug that is inhaled into the lungs and widens the airways. Asthma attacks can be brought on by exercise, allergic reactions and cold weather.
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