Bronchial challenge testing is most often used to test for asthma. It is also useful for detecting unknown allergens, especially in occupational settings. It is an inhalation test using a chemical known as methacholine. It is sometimes referred to as the methacholine challenge test.
- Do not smoke for 8 hours prior to the test, and do not take Atrovent or Combivent 12 hours prior to the test.
- Bronchial challenge testing must be done under the supervision of a physician, trained in the technique and risks.
- The bronchial challenge test may also be used to help diagnose the cause of a chronic cough.