Objective: Inhaled therapy is essential in cystic fibrosis; however, inhalers have a significant environmental impact due to the greenhouse gases (GHGs) emitted. The environmental impact of a product is estimated by its carbon footprint (CF). Pressurized metered-dose inhalers (pMDIs) have a higher CF than dry powder inhalers (DPIs) and soft mist inhalers (SMIs) due to the incorporation of GHGs. The objectives are to analyze the consumption of inhalers (β2-adrenergic agonist bronchodilators, anticholinergics, and/or corticosteroids) in a cystic fibrosis unit and estimate the generated CF.
Method: Retrospective determination (January 2018-December 2023) of consumption and CF (tCO2eq) by type of inhaler was conducted. Consumption and CF trends were evaluated using lineal regression.
Results: Annually, 1,529 (1,279-1,613) pMDIs, 1,055 (855-1,333) DPIs, and 28 (20-42) SMIs were dispensed, representing 55.97%, 42.33%, and 1.70%, respectively. A statistically significant positive trend in the consumption of SMIs was observed. The median annual CF was: pMDI 38.3 (31.2-40.3) tCO2eq, DPIs 0.8 (0.6-0.9) tCO2eq, and SMIs 0.02 (0.02-0.03) tCO2eq, representing 97.86, 2.04, and 0.10%, respectively.
Conclusions: pMDIs were the inhalers with the highest consumption and CF, although their consumption appears to be decreasing, with an increase in the consumption of SMIs.
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