NCT06999343

Brief Summary

Prospective, multicentre, double-blind, placebo-controlled, randomised, prospective clinical trial comparing the effect of metformin 850 mg twice daily with placebo in COPD patients with evidence of emphysema (by CT scan or reduced DLCO) who are known to have a rapid decrease in FEV1. Main objective: To compare the change in FEV1 at 3 years follow-up in patients receiving metformin versus placebo. Participants will take metformin (850mg) or placebo twice daily for 3 years.

Trial Health

65
Monitor

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
212

participants targeted

Target at P25-P50 for phase_3

Timeline
40mo left

Started Sep 2025

Typical duration for phase_3

Status
not yet recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress18%
Sep 2025Sep 2029

First Submitted

Initial submission to the registry

May 15, 2025

Completed
16 days until next milestone

First Posted

Study publicly available on registry

May 31, 2025

Completed
3 months until next milestone

Study Start

First participant enrolled

September 1, 2025

Completed
3.7 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

May 1, 2029

Expected
4 months until next milestone

Study Completion

Last participant's last visit for all outcomes

September 1, 2029

Last Updated

May 31, 2025

Status Verified

May 1, 2025

Enrollment Period

3.7 years

First QC Date

May 15, 2025

Last Update Submit

May 22, 2025

Conditions

Outcome Measures

Primary Outcomes (2)

  • Forced expiratory volume in the first second (FEV1)

    The amount of air expelled during the first second of a maximal expiration, performed after a maximal inspiration.

    At inclusion and at 3-years follow-up

  • Carbon monoxide diffusion test (DLCO)

    Pulmonary function test, in which the diffusion of gases through the pulmonary alveoli into the blood is studied.

    At inclusion and at 3-years follow-up

Secondary Outcomes (19)

  • Age

    Baseline

  • Sex at birth

    Baseline

  • Height

    Baseline

  • Weight

    Baseline and at 1 year, 2 years and 3 years

  • Smoking

    Baseline

  • +14 more secondary outcomes

Study Arms (2)

Experimental treatment

EXPERIMENTAL

Experimental treatment: Metformin Tolerance phase dose: 850mg/24h for 2 weeks. Treatment dose: 1700mg twice daily. Pharmaceutical form: 850 mg oral tablet. Duration of treatment: Treatment will last for 3 years.

Drug: Metformin 850Mg Tab

Control treatment

PLACEBO COMPARATOR

Control treatment: Placebo Tolerance phase dose: One tablet/24h for 2 weeks. Treatment dose: Two tablets twice a day. Pharmaceutical form: Tablets with the same appearance as metformin tablets. Duration of treatment: Treatment will last for 3 years.

Other: Placebo

Interventions

Tolerance phase dose: 850mg/24h for 2 weeks. Treatment dose: 1700 mg twice daily.

Experimental treatment
PlaceboOTHER

Tolerance phase dose: One tablet/24h for 2 weeks. Treatment dose: Two tablets twice daily.

Control treatment

Eligibility Criteria

Age40 Years - 75 Years
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Sign the informed consent form prior to any study-specific procedure.
  • Male or female, aged 40 to 75 years, inclusive, at the time of Screening.
  • Have a COPD clinic diagnostic according to Global Initiative for Obstructive Lung Disease (GOLD) 2022 with a post-bronchodilator FEV1/FVC \<0.7 at Screening (Visit 1)
  • Have a post-bronchodilator FEV1 \>40% ≤ 70% of the predicted value at Screening (Visit 1)
  • Smoking history of more than 10 pack/years (\[number of cigarettes smoked per day x number of years smoked\]/20)
  • Must have been able to understand and comply with the requirements of the study, as judged by the investigator.
  • Have some kind of emphysema (centrolobulillar or paraseptal) reported by an expert radiologist.
  • Have a certified decrease of the Lung Function in the last 3 years \>40 ml/ml per year of FEV1.
  • Women in childbearing age with negative pregnancy test.

You may not qualify if:

  • Participating in another clinic trial with any commercially or investigational biological medicinal product within 4 months prior to Screening.
  • Patients who take oral corticosteroids chronically.
  • Respiratory track infection history (superior respiratory tract included) and pulmonary exarcerbation within 6 weeks prior to Screening.
  • Lung resection or lung volume reduction surgery within 12 months prior to Screening (Visit 1), or lung trasplant history, or, as judged by the investigator, patient may have required a thoracotomy or other lung surgery during the study.
  • Known active tuberculosis.
  • History of intersticial lung or massive pulmonary thromboembolic disease.
  • History of bronchiectasis secondary to respiratory diseasesother than COPD (e.g. cystic fibrosis, Kartagener's syndrome, etc.).
  • Any clinically significant disease or disorder (e.g. cardiovascular, gastrointestinal, hepatic, renal (GFR \< 30 ml/min), neurological, musculoskeletal, endocrine, metabolic, psychiatric, and major physical impairment) that, in the opinion of the investigator, could have placed the patient at risk for participation in the study, could have influenced the study results, or could have affected the patient's ability to participate in the study.
  • Recent history (within 12 months prior to screening \[Visit 1\]) of myocardial infarction, recent history of heart failure (New York Heart Association \[NYHA\] classes III and IV), pulmonary oedema and/or cardiac arrhythmia.
  • History of cancer (within 5 years prior to Visit 1), except non-metastatic skin cancer and non-melanoma.
  • Patients who cannot perform spirometry manoeuvres or tolerate plethysmography.
  • Contraindications to the use of metformin: allergy to the drug, advanced renal failure (CKD stage 3 and above), patients on dialysis, chronic metabolic or respiratory acidosis or liver cirrhosis.
  • Patients with type 2 Diabetes Mellitus with or without previous use of metformin.
  • Pregnant women, nursing mothers or women of childbearing age who are not going to use contraceptive methods.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

MeSH Terms

Conditions

Pulmonary Disease, Chronic Obstructive

Interventions

Metformin

Condition Hierarchy (Ancestors)

Lung Diseases, ObstructiveLung DiseasesRespiratory Tract DiseasesChronic DiseaseDisease AttributesPathologic ProcessesPathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

BiguanidesGuanidinesAmidinesOrganic Chemicals

Central Study Contacts

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
TRIPLE
Who Masked
PARTICIPANT, CARE PROVIDER, INVESTIGATOR
Purpose
TREATMENT
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

May 15, 2025

First Posted

May 31, 2025

Study Start

September 1, 2025

Primary Completion (Estimated)

May 1, 2029

Study Completion (Estimated)

September 1, 2029

Last Updated

May 31, 2025

Record last verified: 2025-05

Data Sharing

IPD Sharing
Will not share