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Can a diabetes drug and diet stop kidney stones?

NCT ID NCT04370093

Disease control Sponsor: University of Texas Southwestern Medical Center Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Sep 01, 2026 · Updated 2 times

Summary

This study tested whether the diabetes drug pioglitazone, weight loss, or both can help prevent uric acid kidney stones in overweight people. Twenty-nine participants were randomly assigned to one of three groups for 24 weeks. The main goal was to see if these interventions could raise urine pH, which is key to stopping stone formation.

What this could mean

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

Active substance
Pioglitazone (a diabetes drug) and weight loss through a lifestyle program
What this could lead to
If successful, this could point to a new way to prevent uric acid kidney stones by combining medication and weight loss.
What could go wrong
This is a small, early-phase trial with only 29 participants, so results may not apply to everyone. Pioglitazone can cause side effects like swelling and liver issues.

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 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

29 people

The number who actually took part.

Started

Oct 2019

Finished

May 2025

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

21 to 99 years

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: Idiopathic uric acid nephrolithiasis, with last stone analysis showing that stone has \>90% uric acid in composition Age \>21 years Any gender, race/ethnicity (from weight loss), but weight \<165 Kg (to fit into MR instrument); eGFR\>60ml/min/1.73 m2 Exclusion Criteria: Bariatric surgery, chronic diarrhea, recurrent UTIs current insulin use use of a thiazolidinedione in past 2 years contraindication to thiazolidinedione use (liver dz, pedal edema, CHF NYHA class III/IV, no contraception) Bladder cancer Use of SGLT2-i, GLP-1 analogs, gemfibrozil, topiramate, rifampin Hba1c \> 8.5%

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Conditions

The condition(s) this trial relates to.

acute urate nephropathy nephrolithiasis nephrolithiasis, uric acid, susceptibility to

As listed by the trial registrant

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

Nephrolithiasis, uric acid

Contacts and locations

Locations

  • University of Texas Southwestern Medical Center

    Dallas, Texas, 75390-9107, United States