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A 45-year-old member asked:

How long does it take for prednisone to work in the treatment of asthma?

1 doctor answer1 doctor weighed in
Dr. Michael Zacharisen
Allergy and Immunology 33 years experience
Within 24 hours: While Prednisone and other oral steroids are rapidly absorbed from the GI tract and begin to kill eosinophils in the blood (common white blood cell in allergic asthma) within 4 hours, the lung effect is typically longer but within 24 hours. (that is why it is important to start Prednisone early in an asthma attack).

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Last updated Jul 4, 2018

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