Top
10
Doctor insights on: Methacholine

Share
Dr. Dariush Saghafi
47 doctors shared insights

Methacholine (Overview)

Methacholine is an asthma agent which is a kind of lung drug.


1

1
Are people still doing the methacholine challenge, and are there risks to it?

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

Methacholine test: Mostly it is done where the diagnosis of asthma is doubtful. It should be done under the careful supervisision of a physician who has experience in the bronchial challenge tests. The test can be done in the hospital pulmonary lab or in the office setting with appropriate. Staff and safety equipment to treat asthma like symptoms. The test is still being done when indicated. ...Read more

See 2 more doctor answers
Dr. Dariush Saghafi
47 doctors shared insights

Methacholine (Overview)

Methacholine is an asthma agent which is a kind of lung drug.


3

3
Asthma methacholine challenge. Is there side-effects from the test?

Asthma methacholine challenge. Is there side-effects from the test?

No...: If a patient is given methacholine and it results in bronchospasm, the patient is then given a bronchodilator which reverses the effect of the methacholine. ...Read more

4

4
How long does it take to get results of the methacholine challenge test?

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

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. ...Read more

5

5
How can I be less susceptible to the methacholine?

How can I be less susceptible to the methacholine?

Limited Options!: This drug, a muscarinic receptor agonist, non-selectively causes smooth muscle contraction in the airways and is used to diagnose "reactive" airway diseases. It also may slow the heart rate, lower the blood pressure and cause excess secretion of the salivary glands. There is genetic specificity for these "receptors, " so that you may be able to "blame your genes" for your susceptibility! avoid it! ...Read more

6

6
Can a person fake a methacholine challenge?

It's hard: An experienced physician, pulmonologist, allergist, etc. Is able to tell when patients are not putting enough effort into a test. ...Read more

7

7
How can i prepare to pass a methacholine challenge?

Methacholin: Challenge is used if the diagnosis of asthma is in question. There is nothing to do to prepare to pass the test.you need to follow your doctors instructions exactly and stop any medications as directed. This is a potentially dangerous test and should only be done in a pulmonary function lab or in a doctors office with those trained to treat acute bronchospasm. It is better in ruling out asthma. ...Read more

8

8
What can cause false negative in a methacholine test?

Medications: A number of medications could cause false negative methacholine challenge test for asthma. A complete list of drugs need to be stopped prior to the test is too long too list here. Consult expert for details ...Read more

9

9
How long will the methacholine challenge usually take?

How long will the methacholine challenge usually take?

Less than 1hr: Less than 1 hr. 30min is about average, depending on how efficient the staff performing the test is in setting up each step, etc. It also depends on whether you have a positive result early vs towards to the end of the test. ...Read more

10

10
What causes false negative results in a methacholine test?

True or False Test?: A "false negative" test means the presence of a "confounding variable" that invalidates the test because it nullifies a test that would probably be positive if the variable were absent, like a brochodilator medicine (e.g.various inhalers and pills for asthma). So the test should be done in the absence of those medications, if possible-or-used as a validation as to the medication's effectiveness. ...Read more

See 1 more doctor answer
Dr. Linda Callaghan
35 doctors shared insights

Provocholine (Definition)

Provocholine is an asthma agent which is a ...Read more