This test will be performed in the Pulmonary Function Lab (Module B6/2), at the University of Wisconsin Hospital and Clinics, 600 Highland Avenue. Please arrive 15 minutes prior to your appointment to allow time to complete the registration process.
Finding your way.
From the parking ramp you will enter through the main Hospital Entrance. Follow the brown pathway past the “D” elevator lobby to “Clinic Registration”. Upon completing registration you will be directed to the Pulmonary Function Lab “Check In” area.
If you are being seen at the American Family Children’s Hospital, please check in at Registration on the 2nd Floor of AFCH. Registration will notify the Pulmonary Function Lab Staff of your arrival.
What is a methacholine challenge?
This is a breathing test done to help your doctor check if you have asthma. You will be asked to breathe in a mist that contains methacholine. This mist can make your breathing worse, better, or stay the same. You will be asked to breathe increasing doses, with breathing tests done between each dose. This test will take 30 to 90 minutes.
How do I prepare for this test?
- Do not exercise or eat a heavy meal for at least four hours before the test.
- Do not have any caffeine, coffee, tea, cola drinks or chocolate.
- If you have or have had a recent cold, flu or other illness this test will need to be scheduled two weeks following the end of your illness.
- Do not smoke on the day of the test.
- Tell your doctor if you are pregnant. This test is not recommended during your pregnancy.
- You will be asked to hold certain medicines before this test:
Albuterol: Hold 8 hours
Atrovent, Combivent, Singulair®, Spiriva®, or theophylline: Hold 24 hours
Serevent®, Flovent®, or Advair®: Hold 48 hours
Antihistamines: Hold 96 hours
Prednisone: 6 weeks
Note: If you are taking any beta blockers (such as atenolol, inderal, metoprolol, or others) please tell your doctor.
How will I feel after the test?
You should feel fine after your test. If you do have any shortness of breath or wheezing you may be given a few puffs of medicine from an albuterol inhaler to get rid of the symptoms. Albuterol may, but does not always, cause one to feel slightly shaky for a short time. You will be able to eat, drink, and keep your normal routine. Your doctor will discuss your test results with you.
If you have any questions or concerns before the test, please call:
Pulmonary Function Lab, Monday-Friday, 8:00 am to 4:30 pm,
Toll free 1-800-323-8942; ask for the Pulmonary Function Lab.
The information provided should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Any duplication or distribution of the information contained herein is strictly prohibited.
Last Updated: 07/16/2012
Copyright © 07/10/2012 University of Wisconsin Hospitals and Clinics Authority. All rights reserved. Produced by the Department of Nursing. HF#6386
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