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NCT07825441Completed

RandomisED Control Trial to Understand Whether Prescribing Choice for inhalErs is Influenced by Knowledge of the CARBON Footprint (REDUCE Carbon)

Source: ClinicalTrials.gov · Last updated 17 Sept 2026

Brief summary (registry, in English)

Climate change is a huge and present threat, with the devastating effects being increasingly seen in everyday life. The NHS contributes substantially to the UKs carbon footprint with an estimated 23 million tonnes gCO2Eq per year, 3% of which comes from pMDIs. There are a number of alternative inhalers, such as DPIs, which do not use propellant and therefore have a significantly lower carbon footprint. There is a call to move towards greener inhalers as part of the NHS long term plan for sustainability, to reduce the carbon footprint and therefore the environmental impact and help protect the health of our patients today and in the future. When recommending an inhaler, a number of factors are usually considered including the ability of the patient to use the device and its cost. Up until now the environmental impact of each inhaler is not routinely available and therefore is not normally considered in prescription choice. Given the increasing evidence supporting the sizeable impact that pMDIs are having on global warming, there needs to be a shift in practice where the climate impact forms part of the decision-making process. This study is looking to explore prescribing behaviours surrounding inhaler selection and in particular whether knowledge of the carbon footprint of inhalers has any sway on prescribing preference. By better understanding the decision-making process, this will allow the production of more comprehensive asthma management guidelines and potentially facilitate a drive to greener inhaler prescribing practices.

Status (registry)
Completed
Study type
Interventional
Enrollment
3782 (actual)
First submitted
19 Aug 2026
Start date
Mar 2022
Primary completion date
Aug 2025
Lead sponsor
Portsmouth Hospitals NHS Trust
Diseases
Asthma
NCT number
NCT07825441

What you commit to

  • Study type: Interventional
  • Participants enrolled: 3782
  • From Mar 2022 to the primary completion date, Aug 2025
  • 1 site in 1 country
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Other

  • Inability to understand or comply with study procedures and/or inability to give fully informed consent.

Who the study is looking for

  • Aged ≥18 years
  • Working as an HCP within the NHS in a primary or secondary care setting
  • Able to provide written e-consent
  • Able to understand and complete the clinical case scenarios

Age in the registry: 18 years to - · Sex: All · Accepts healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (1)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Portsmouth Hospitals University NHS Trust, Research Department
Coordinator of this site? Confirm its status
PortsmouthUnited KingdomUnknown status

This page is information, not medical advice. Discuss any trial with your doctor.