How to Use an Inhaler

Metered-Dose Inhalers (MDI): How to Use

The metered-dose inhaler (MDI) is a canister of medicine that releases a medicated mist. You inhale the mist into the airways of your lungs. The MDI can be used alone, but it is highly recommended that you use a spacer or valved holding device attached to the MDI.


Several different types of medicines are available as MDIs, including:

If you are using more than one type of MDI, you will usually use the bronchodilator first.


There are several ways to use an MDI. If you are not using a spacer or valved holding device, the technique most often recommended is as follows:


Written by the Asthma Task Force at The Children's Hospital, Denver.