Spacer for metered-dose inhaler

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Child using inhaler with attached spacer, with end of spacer in mouth while holding spacer with one hand and inhaler with other.

A spacer is a chamber that can be attached to a metered-dose inhaler (MDI). The spacer may have a one-way valve that holds the medicine in the chamber before it is inhaled. This way you can inhale the medicine in one or many breaths, depending on your ability. A spacer:

  • May help prevent getting a yeast infection in your mouth. And using one can prevent your voice from sounding hoarse.
  • Delivers more medicine straight to your airways. This is true even if you have trouble using your inhaler.
  • Reduces the amount of medicine you swallow. This means you are less likely to have side effects.

It is especially important to use a spacer with an inhaler that contains corticosteroids. Spacers also may be used by children who have trouble using a metered-dose inhaler correctly. Don't use a dry powder inhaler (DPI) with a spacer.

Current as of: August 6, 2023

Author: Healthwise Staff
Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.