Test: Methacholine Challenge Tests

Your doctor has requested that you have a breathing test to determine if your airways are hyper-reactive when exposed to certain substances. These tests are not painful and may take up to one hour. On the day of your test please avoid any caffeine products such as coffee, tea, cola or chocolate. Some medications will interfere with the testing and should be withheld prior to your test if possible.

DO NOT TAKE:

Short-acting bronchodilators for at least 8 hoursprior to the start of your test. These may include but are not limited to: Airomir, Bricanyl and Ventolin (Salbutamol).

  • Medium-acting bronchodilators for at least 24 hours before your test. These may include Atrovent.

Long-acting bronchodilators for at least 48 hours prior to the start of your test. These may include but are not limited to: Advair, Oxeze, Serevent, Symbicort and Zenhale.

Leukotriene receptor antagonists for 24 hours prior to testing. These may include but are not limited to: Accolate and Singular.

Antihistamines for at least 3 days prior to testing. These may include but are not limited to: Allegra, Aerius, Benedryl, Claritin, Chlor-Tripolon and Reactine.

Long acting anticholinergics such as Spiriva should be withheld for 7 days.

CONTINUE TO TAKE:

All anti-inflammatory (steroid containing) medications. These may include but are not limited to: Alvesco, Flovent, Pulmicort, Prednisone and Qvar.

After the test you may restart all your medications in the usual manner. If you have any concerns regarding your medications or the test, please contact your doctor. Should you need to cancel your appointment, please contact us at: St. Paul's Hospital, Pulmonary Function Lab, 8th Floor Providence Wing 604-806-2080.