Definition: A dry powder inhaler, or DPI for short, is a type of inhaler device for administering asthma medicine. It is similar to a metered dose inhaler, but the medication is in powder form, rather than in liquid form. You inhale a puff of the powder, rather than a mist of liquid.
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"Dry Powder Inhaler (DPI)"
By Kathleen MacNaughton, R.N., About.com
Updated: February 28, 2008
About.com Health's Disease and Condition content is reviewed by Sanja Jelic, MD
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