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Pulmonary Disease Homepage

PFT with Methacholine Challenge Instructions

The instructions below must be followed in order to produce an accurate result.  If these instructions are not followed your appointment may have to be rescheduled. 

  • If you have had an Influenza Vaccine 2 weeks prior to your appointment, a new appointment will need to be scheduled.  This will affect the results.
  • No Prednisone 7 days before testing.
  • No caffeine 24 hours before testing. 
    • This includes soda, coffee, tea, chocolate, Excedrin or any other foods containing caffeine. 
    • No decaffeinated items, as these also contain caffeine.  If in doubt, choose water, juice or white milk to drink.
  • No antihistamines/cold medicines, Singulair or Accolate 48 hours before testing.
  • No inhalers 24 hours before testing.
  • No smoking 6 hours before testing.
  • Do not eat 1 hour before testing.
  • Please allow 1 hour for testing.
  • If you think you may be pregnant or are breastfeeding, please notify your physician prior to test.

If you have any questions or do not understand the instructions, please call our office at 217.528.7541.