• What is a metered-dose inhaler?

    A metered-dose inhaler is a device that helps deliver a specific amount of medication to your lungs. It is commonly used to treat asthma.

    Each inhaler consists of a pressurized canister of medication and a mouthpiece. Pressing down on the inhaler releases a mist of medicine that you breathe into your lungs.

    How do I use a metered-dose inhaler correctly?

    A. Open mouth. Hold inhaler 2-4 cm away.

    B. Use spacer attached to inhaler.


    1. Remove the cap and hold the inhaler upright.
    2. Shake the inhaler.
    3. Hold the inhaler as in one of the pictures A or B
    4. Spacers are useful for all patients, especially young children and older adults (see picture B).
    5. Press down on the inhaler to release the medicine as you start to breathe in slowly.
    6. Breathe in slowly for 3 to 5 seconds.
    7. Hold your breath for 10 seconds to allow medicine to go deeply into your lungs.
    8. Repeat puffs as directed. Wait 1 minute between puffs to allow the second puff to get into the lungs better.


    Click on the link below to view a clip showing how to use an MDI


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