Become a Patient

Peak Flow Zone Chart

The following table shows an example of how these zones work. Your doctor can help you create a similar table for your own asthma.

Green: 80-100% of your personal best

  • Your breathing is good.
  • You do not have any early warning signs or asthma symptoms.
    • Take all your medicines every day, as your doctor tells you.
  • Take your inhaler before exercise, as your doctor tells you.

Yellow: Caution 60-80% of your personal best

  • Runny, stuffy nose.
  • Feel more tired.
  • Chin or throat itches.
  • Sneezing.
  • Restless
  • Red or pale face
  • Coughing
  • Dark circles under your eyes
  • Use "rescue" medicine
  • Recheck peak flows after 20-30 minutes
  • Call your doctor, healthcare professional, or nurse care manager:
    • if your peak flow is not back uo to the Green Zone
    • if your peak flow drops into the Yellow Zone again in less that 4 hours.

Red: Danger Below 60% of your personal best

  • Cough, more at night
  • Wheezing
  • Chest feels tight or hurts
  • Breathing faster than normal
  • Get out of breath easily
  • Use your quick-relief medicine by inhaler or nebulizer right away!
  • Call your doctor or 911 NOW

This information has been approved by David Tinkelman, M.D. (February 2006).

© Copyright 2008 National Jewish Medical and Research Center

The Allergy Wizard