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How do hydrofluoroalkane inhalers (HFA) work to treat chronic obstructive pulmonary disease (COPD)?

ANSWER

Hydrofluoroalkane inhalers (HFAs) have a liquid medication you get through an aerosol spray. The medicine is in a pressurized canister that has a metering valve. You can close your lips around the mouthpiece or place the mouthpiece 1-2 inches from your mouth and breathe in slowly as you press down on the inhaler.

Many people like to use a spacer. It’s a hollow plastic tube attached between the mouthpiece and the canister of medicine. A spacer makes it easier to get the full dose of medication all the way to your lungs.

From: What Devices Help Treat COPD? WebMD Medical Reference

SOURCES:

Norman Edelman, MD, chief medical officer, American Lung Association.

Gail Weinmann, MD, deputy director, NHLBI’s Division of Lung Diseases, Washington D.C.

American Association for Respiratory Care.

American Lung Association.

Global Initiative for Chronic Obstructive Lung Disease.

National Heart, Lung, and Blood Institute.

National Jewish Health.

National Lung Health Education Program.

Reviewed by Dan Brennan on July 25, 2017

SOURCES:

Norman Edelman, MD, chief medical officer, American Lung Association.

Gail Weinmann, MD, deputy director, NHLBI’s Division of Lung Diseases, Washington D.C.

American Association for Respiratory Care.

American Lung Association.

Global Initiative for Chronic Obstructive Lung Disease.

National Heart, Lung, and Blood Institute.

National Jewish Health.

National Lung Health Education Program.

Reviewed by Dan Brennan on July 25, 2017

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How do dry powder inhalers (DPI) work to treat chronic obstructive pulmonary disease (COPD)?

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