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.
Dry Powder Inhaler (DPI)
by Kathleen MacNaughton, R.N.
for About.comUpdated: July 31, 2008
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
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