SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Young girl using a pressurized aerosol Ventolin inhaler to control recurrent attacks of asthma. The Ventolin inhaler contains a drug called salbutamol, which dilates the bronchial muscles, allowing air to pass to the lungs. In bronchial asthma the narrowing of the airways is produced by spasm of the muscles in the bronchial tubes. These spasms are associated with swelling of the lining surfaces & an increased production of secretions.
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