Pressurized metered-dose inhalers and their impact on climate change.

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Date: Mar. 28, 2022
From: CMAJ: Canadian Medical Association Journal(Vol. 194, Issue 12)
Publisher: CMA Impact Inc.
Document Type: Article
Length: 747 words
Lexile Measure: 2210L

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1 Pressurized metered-dose (pMDI) inhalers are an important contributor to greenhouse gas emissions

Hydrofluorocarbon propellants in pMDIs are responsible for roughly 0.03% of yearly global greenhouse gas emissions. (1) Prescriptions for pMDIs represent about 3% of total health care-related emissions from the United Kingdom's National Health Service. (2) The carbon footprint from 1 pMDI (200 doses) is estimated as equivalent to a 290-km automobile ride. (3) Reducing pMDI prescriptions when appropriate could have a meaningful environmental impact.

2 Alternative inhalers with lower carbon impact are available

Dry powder and soft mist inhalers, both available as rapid reliever and maintenance therapies, are commonly used in the treatment of asthma and chronic obstructive pulmonary disease. Dry powder and soft mist inhalers contribute a lower carbon dioxide equivalency (< 20 g C[O.sub.2]e per inhalation) than pMDIs (about 100 g C[O.sub.2]e per inhalation). (1)

3 Dry powder and soft mist inhalers are effective and can have advantages over pMDI prescription

Compared with pMDIs, alternative inhaler devices show similar efficacy and are often preferred by patients. (4-6) The Canadian Thoracic Society guideline highlights reliever therapy with a budesonideformoterol dry powder inhaler as an appropriate...

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Gale Document Number: GALE|A698015017