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A 39-year-old member asked:

how long does it take to get results of the methacholine challenge test?

1 doctor answer3 doctors weighed in
Dr. Suresh Anand
Allergy and Immunology 26 years experience
Methacholine test: The test result is available as soon as the test is completed. It can take half to one hour. A physician has to interpret the test results. Some times the answer may not be clear cut.

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Similar questions

A 38-year-old member asked:

Are people still doing the methacholine challenge, and are there risks to it?

3 doctor answers7 doctors weighed in
Dr. Suresh Anand
Allergy and Immunology 26 years experience
Methacholine test: At the national jewish hospital in denver we did lot of research work for the diagnosis of asthma. The test can take up to about an hour. The patient has to be monitored closely during the test. Bronchial challenge tests can also be done with histamine, mannitol and individual allergens like pollen, dust, molds etc.
A 34-year-old member asked:

Can a person fake a methacholine challenge?

1 doctor answer2 doctors weighed in
Dr. Robert Ramirez
Allergy and Immunology 18 years experience
It's hard: An experienced physician, pulmonologist, allergist, etc. Is able to tell when patients are not putting enough effort into a test.
A 42-year-old member asked:

How long until you get results of the methacholine challenge test?

1 doctor answer1 doctor weighed in
Dr. Robert Ramirez
Allergy and Immunology 18 years experience
Same day...: ... If your doctor is available when performing the test. They should be able to tell you immediately the results.
A 37-year-old member asked:

What are the risks doing the methacholine challenge?

2 doctor answers3 doctors weighed in
Dr. Steven Cohen
Sports Medicine 22 years experience
Asthma: Methacholine test is used to document changes of obstruction, which can be reversed, compatible with asthma. Since the test is done in stages, with spirometry between each stage, one should not develop severe symptoms. Patients should not have significant obstruction before starting the test and most pulmonary function labs will not proceed if baseline studies are very abnormal.
A 40-year-old member asked:

Why do doctors tell you not smoke or to use caffine before the methacholine challenge test?

1 doctor answer1 doctor weighed in
Dr. Asaf Presente
Pulmonary Critical Care 16 years experience
For unaltered result: Since both caffeine (which can relax the bronchial muscle tone) and smoking - (which can irritate bronchial muscle tone making it more sensitive) - can affect the test - these factors and others are to be avoided ahead of a methacholine test which is trying to guage the patient's baseline bronchial reactivity (often to investigate the presence of asthma).

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Last updated May 4, 2016
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