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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medically reviewed by WellAlly Editorial TeamLast reviewed October 19, 2026Editorial policy
Medication21 min read

Proper Inhaler Technique for Metered-Dose Inhalers (MDIs)

Published: October 19, 2026Updated: October 19, 2026

Using an inhaler with the correct technique ensures that prescribed respiratory medication reaches deep into your bronchial passages rather than collecting in your mouth or throat. Many individuals unknowingly make minor handling errors that diminish drug delivery and leave asthma or COPD symptoms poorly managed. Following a structured, step-by-step administration method maximizes therapeutic benefit and minimizes potential side effects.

Quick Summary

Shake the inhaler, exhale fully, breathe in slowly and deeply while pressing down on the canister, hold your breath for 10 seconds, and rinse your mouth if using a steroid.

Important Medical Disclaimer

This guide is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with qualified healthcare providers for medical concerns.

Step-by-Step Guide

1

Inspect and Shake the Inhaler

Remove the mouthpiece cap and examine both the inside and outside of the device to ensure it is free from lint, dirt, or foreign objects. Check the built-in dose counter to confirm that the canister still contains medication. Hold the inhaler upright and shake it vigorously for 5 seconds to properly blend the drug formulation with the propellant.

Important: If the inhaler is brand new or has not been used for several days, prime it by spraying the specified number of test puffs into the air away from your face before use.

2

Exhale Completely Away from the Mouthpiece

Sit up straight or stand to allow your diaphragm to move freely and maximize lung capacity. Take a normal breath in, and then exhale slowly and completely through your mouth away from the inhaler. Emptying your lungs creates the necessary space to inhale the aerosolized medicine deeply.

3

Position the Inhaler and Form a Seal

Hold the inhaler vertically with your thumb supporting the base underneath the mouthpiece and your index finger resting on the top of the metal canister. Place the mouthpiece between your teeth and rest it flat on your tongue without biting. Close your lips firmly around the opening to create an airtight seal without obstructing the nozzle spray.

Important: Using a valved holding chamber (spacer) is strongly recommended with MDIs, as it eliminates the need for strict hand-breath coordination and significantly increases lung delivery.

4

Actuate and Inhale Slowly and Deeply

Begin breathing in smoothly and slowly through your mouth, and simultaneously press down firmly on the canister once to release a single dose. Continue drawing your breath in steadily over a full 3 to 5 seconds until your lungs are completely filled. Inhaling too rapidly causes the medicine droplets to impact the back of your throat rather than reaching the lower airways.

5

Hold Your Breath

Remove the inhaler mouthpiece from your mouth and close your lips. Hold your breath for up to 10 seconds, or for as long as is comfortably possible, before breathing out gently. This pause allows gravity to settle the microscopic aerosol particles onto the surfaces of your bronchial tubes.

6

Wait Before Taking a Second Puff

If your treatment plan requires a second puff of the same medication, wait approximately 30 to 60 seconds before repeating the sequence. This interval allows the propellant pressure inside the canister to normalize and gives initial bronchodilation time to open airways. Repeat all steps, including shaking the device, for every subsequent puff.

7

Rinse Your Mouth and Store the Device

Wipe the mouthpiece clean with a dry tissue, reattach the protective cap, and store the unit at room temperature away from excessive moisture. If your inhaler contains a corticosteroid, swish water around your oral cavity thoroughly, gargle, and spit the water into a sink. Never swallow the rinse water.

Important: Skipping oral rinsing after using an inhaled corticosteroid significantly increases your risk of developing hoarseness (dysphonia) and oral candidiasis (thrush).

Frequently Asked Questions

Why should I use a spacer or holding chamber with my inhaler?
A spacer suspends the aerosolized medication in a temporary holding chamber, removing the need to perfectly coordinate pressing the canister with breathing in. It also filters out larger droplets, decreasing drug residue in your mouth and throat while substantially increasing delivery to the lungs.
How do I know when my inhaler is truly empty?
Always rely on the built-in numeric dose counter on the canister to track remaining doses. If your inhaler lacks a counter, divide the total number of labeled puffs by your prescribed daily usage to mark the discard date on the canister; never submerge the canister in water to check buoyancy, as this can ruin the valve.
Is the inhalation technique the same for dry powder inhalers (DPIs)?
No. Metered-dose inhalers require a slow, gentle breath because propellant expels the mist, whereas dry powder inhalers (such as Diskus or Turbuhaler devices) require a quick, forceful, and deep breath to mechanically pull the fine powder into the lungs.
How often should I clean my inhaler and spacer?
For most standard MDIs, remove the metal canister and rinse the plastic actuator under warm running water once a week, allowing it to air-dry completely. Spacers should be washed weekly in warm water with mild dish soap and air-dried without towel wiping to prevent static buildup.
  1. 1
    Centers for Disease Control and PreventionSource
  2. 2
    National Heart, Lung, and Blood InstituteSource
  3. 3
    National Health Service (NHS)Source
  4. 4
    Mayo ClinicSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed October 19, 2026. · Read our editorial policy