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A member asked:
How does methacholine give you asthma symptom ?
A doctor has provided 1 answer
Bronchospasm : Methacholine induces bronchospasm in susceptible patients. Once it is inhaled, you undergo pulmonary function testing looking for airway obstruction. Once present, it is them reversed with a bronchodilator inhaler. This fulfills the definition of asthma: reversible obstruction. Most patients will not experience any symptoms during this test, even if obstruction occurs. It is a very safe test.
Answered 9/30/2020
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Related Questions
A member asked:
Episodic difficulty with inhale; also chronic rhinitis. Dr doesn't suspect asthma but wishes to rule it out with methacholine test. Effective test?
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Which is more accurate to diagnose asthma - methacholine challenge or pulmonary function test?
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Had a methacholine test. I reacted with cough & wheezing & tightness.Only dropped 12% the whole time & went the whole 5 doses. Dr says neg 4 asthma?
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Was told I have no asthma (per methacholine test), just vocal cord dysfunction. Albuterol relieved difficulty breathing in, in less than 5 min. Why?
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6 doctors weighed in across 2 answers
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