Metered Dose Inhalers

Download the Using a Metered Dose Inhaler – What You Need to Know PDF.

 

Metered dose inhalers (MDIs) can contain long-term controller medicine or quick-relief medicine. It is important to know which medicine your inhaler contains because the two types of medicines work on different parts of asthma.

Spacers (holding chambers)

Whenever possible, use a spacer (also known as a “holding chamber”) with your metered dose inhaler. A spacer is a plastic tube that connects to the mouthpiece of an inhaler and helps get medicine deeper into the lungs and airways.

A spacer helps direct the medicine to the airways so that each dose of medicine is more effective and less medicine is wasted.

Using a metered dose inhaler with a spacer:

  1. Remove any candy, food or gum from your mouth.
  2. Stand up straight.
  3. Remove the cap of the inhaler and attach it to the spacer. Make sure to clean out any dust or fuzz so that there is nothing inside either one.
  4. Shake the inhaler and spacer for five seconds.
  5. Take a deep breath in and breathe out slowly to empty your lungs completely.
  6. Put the spacer in your mouth and seal your lips around the mouthpiece.
  7. Press down on the inhaler and take a slow deep breath in.
  8. Hold your breath for 10 seconds and then breathe out.
  9. If using a controller medicine, rinse your mouth with water and spit water out.

Using a metered dose inhaler without a spacer:

  1. Remove any candy, food or gum from your mouth.
  2. Stand up straight.
  3. Remove the cap of the inhaler and attach it to the spacer. Make sure to clean out any dust or fuzz so that there is nothing inside either one.
  4. Shake the inhaler and spacer for five seconds.
  5. Take a deep breath in and breathe out slowly to empty your lungs completely.
  6. Place the inhaler mouthpiece inside your mouth and seal your lips tightly around the mouthpiece.
  7. Take a slow breath in, press down on the inhaler and breathe in the medicine.
  8. Hold your breath for 10 seconds and then breathe out.
  9. If using a controller medicine, rinse your mouth with water and spit water out.