Dapagliflozin in Pulmonary Arterial Hypertension (DAPAH)

January 16, 2026 updated by: Mads Ersbøll

Effects of DAPAgliflozin on Cardiopulmonary Exercise Capacity and Hemodynamics in Pulmonary Arterial Hypertension: A Double Blind Randomized Trial. (DAPAH-trial)

The purpose of this study is to investigate the effects of dapagliflozin on exercise capacity and hemodynamics in patients with pulmonary arterial hypertension

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The objective of this study is to evaluate the effects of oral dapagliflozin (Forxiga®) treatment versus placebo in clinically stable patients with pulmonary arterial hypertension or CTEPH on background vasodilator combination therapy on cardio-pulmonary exercise capacity, pulmonary vascular hemodynamics, RV function and metabolomic profile of the pulmonary vascular endothelium.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
52

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Denmark
      • Copenhagen, Denmark, 2100
        • Rigshospitalet

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • A diagnosis of PAH group 4 or group 1 in any of the following subtypes:

    • Idiopathic PAH (iPAH)
    • Heritable PAH (hPAH)
    • Connective tissue disease associated PAH (aPAH)
    • Associated with congenital heart disease (aPAH)
    • In case of PH in group 4, no further invasive treatment including pulmonary endarterectomy or pulmonary balloon angioplasty must be planned at time of inclusion.
  • Symptomatic PAH in WHO functional class II-III as assessed by the screening clinician.
  • Clinically stable patients on pulmonary vasodilator treatment with PDE5i, ERA, PA/IPA alone or in combination without considerations from the treating physician team towards treatment escalation and a treatment duration of at least four weeks. Clinical stability defined as stable symptoms without progression as assessed by treating clinician and without the need for unplanned hospital admissions due to worsening PAH within three months of screening.
  • Fertile women (< 50 years of age) must use safe contraceptives (Intra uterine device or hormonal contraception) for the duration of the study and have a negative pregnancy test
  • Able to understand the written patient information in Danish and give informed consent.
  • Age ≥ 18 years
  • Ability to perform cardio pulmonary exercise test

Exclusion Criteria:

  • Known allergy to the study medication
  • Treatment with an SGLT2i within 6 months prior to baseline
  • Type 1 or type 2 diabetes
  • Impaired renal function with an eGFR < 30 mL/min/m2 within four weeks of screening
  • Severe liver dysfunction (Child-Pugh class c)
  • Listed for lung transplantation at the time of screening
  • Planned initiation of iv prostacyclin therapy/ IPA or current dose escalation planned
  • Planned pulmonary endarterectomy or pulmonary balloon angioplasty.
  • LVEF < 50%
  • Diagnosis of PAH group 2, 3 or 5

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Dapagliflozin 10 mg once daily
Dapagliflozin 10 mg (Farxiga 10 mg) given once daily for three months
Drug: Dapagliflozin 10 MG [Farxiga]
Dapagliflozin 10 mg given once daily for three months
Placebo Comparator: Matching placebo
Placebo given once daily for three months
Drug: Placebo
Matching placebo

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Change in VO2 max from baseline to follow up
Time Frame: 3 months
3 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Change in 6 minutes walking distance
Time Frame: 3 months
3 months
Change in VE/VCO2
Time Frame: 3 months
3 months
Change in pulmonary vascular resistance
Time Frame: 3 months
3 months
Change in mean pulmonary artery pressure
Time Frame: 3 months
3 months
Change in Cardiac index
Time Frame: 3 months
3 months
Change in central venous pressure
Time Frame: 3 months
3 months
Change in transpulmonary gradient
Time Frame: 3 months
3 months
Change in pulmonary arterial compliance
Time Frame: 3 months
3 months
Change in right ventricular size on 3D echocardiography
Time Frame: 3 months
3 months
Change in right ventricular free wall strain
Time Frame: 3 months
3 months
Change in right ventricular free wall strain-work (free wall strain/ pulmonary artery pressure)
Time Frame: 3 months
3 months
Change in NTproBNP
Time Frame: 3 months
3 months
Change in EQ-5D-5L questionnaire
Time Frame: 3 months
3 months
Change in metabolomic pattern on central venous blood
Time Frame: 3 months
3 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Mads Ersbøll

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2023

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 13, 2026

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 13, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 16, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 16, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 5, 2022

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 21, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 16, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • DAPAH16122021

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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