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How can a methacholine challenge test diagnose adult-onset asthma?

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If your symptoms and lung function test don't clearly show asthma, your doctor may recommend a methacholine challenge test. If you have asthma, methacholine will make your airways spasm and get narrow when you breathe it in.

From: Adult-Onset Asthma WebMD Medical Reference

SOURCES: 

Asthma and Allergy Foundation of America: "Adult Onset of Asthma" and "Exercise-Induced Bronchoconstriction (Asthma)." American Society of Anesthesiologists: "Aging and the Respiratory System."  National Institute on Aging: "Aging Under the Microscope: Chapter 4: Physiologic Clues."  American Lung Association: "Asthma in Adults Fact Sheet."  Graham, L. , 2006.  Boehringer Ingelheim: "US FDA Expands Approval of Tiotropium Respimat® for Maintenance Treatment of Asthma in Children." FDA. Prescribing Information: Spiriva Respimat.





Chest

Medscape.

Reviewed by Nayana Ambardekar on July 7, 2018

SOURCES: 

Asthma and Allergy Foundation of America: "Adult Onset of Asthma" and "Exercise-Induced Bronchoconstriction (Asthma)." American Society of Anesthesiologists: "Aging and the Respiratory System."  National Institute on Aging: "Aging Under the Microscope: Chapter 4: Physiologic Clues."  American Lung Association: "Asthma in Adults Fact Sheet."  Graham, L. , 2006.  Boehringer Ingelheim: "US FDA Expands Approval of Tiotropium Respimat® for Maintenance Treatment of Asthma in Children." FDA. Prescribing Information: Spiriva Respimat.





Chest

Medscape.

Reviewed by Nayana Ambardekar on July 7, 2018

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Can a chest x-ray diagnose adult-onset asthma?

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