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Diabetes drug could improve heart failure treatment

NCT ID NCT04438213

Disease control Sponsor: Yale University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This phase 2 trial at Yale University is testing whether the diabetes drug ertugliflozin can help people with chronic heart failure manage fluid buildup better than a standard diuretic (metolazone) or a placebo. Sixty adults on daily diuretics will take one of the three treatments for six weeks. Researchers will measure changes in blood volume and sodium excretion to see if ertugliflozin offers unique benefits without causing dehydration.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Ertugliflozin (a diabetes drug) and metolazone (a diuretic)
What this could lead to
If successful, this could show that ertugliflozin helps manage heart failure better than standard diuretics, with fewer side effects like dehydration.
What could go wrong
This is a small, early-phase study (60 people) looking at short-term effects. It may not prove long-term benefit or safety, and results may not apply to all heart failure patients.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 60 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2021

Expected to finish

Dec 2025

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. A clinical diagnosis of chronic heart failure (either systolic or diastolic) 2. Chronic daily oral loop diuretic dose use 3. eGFR ≥20 mL/min/1.73 m2 4. English speaking participants only 5. Signed informed consent Exclusion Criteria: 1. Current use or plan to initiate renal replacement therapy or ultrafiltration 2. Significant bladder dysfunction or urinary incontinence 3. Inability to comply with the serial urine collection procedures 4. Current use of a thiazide or thiazide like diuretics or use within 5 half-lives of the drug, including metolazone 5. Current use of a SGLT-2 inhibitor, or in the treating provider's judgement, contraindication to be withdrawn from current use of an SGLT-2 inhibitor 6. Prior heart transplant, critical stenotic valvular disease or complex congenital heart 7. History of type 1 diabetes, diabetic ketoacidosis, "brittle" diabetes or frequent hypoglycemia or severe hypoglycemic episodes requiring emergent intervention (ER visit or EMS response, glucagon administration or forced oral carbs) in the last 3 months 8. History of or current urosepsis or frequent urinary tract infections 9. Anemia with hemoglobin \<8g/dL (due to required phlebotomy for the study) 10. Pregnancy or breastfeeding 11. Appears unlikely or unable to participate in the required study procedures, as assessed by the study PI, study coordinator, or designee (ex: clinically-significant psychiatric, addictive, or neurological disease) 12. Inability to give written informed consent or follow study protocol 13. Severe peripheral artery disease, previous amputation, or threatened amputation 14. Life expectancy \< 3 months

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Conditions

The condition(s) this trial relates to.

congestive heart failure heart failure

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Heart failure

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Yale School of Medicine

    RECRUITING

    New Haven, Connecticut, 06510, United States

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