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Scientists probe GLP-1's role in Post-Bypass blood sugar woes

NCT ID NCT01803451

Knowledge-focused Sponsor: The University of Texas Health Science Center at San Antonio 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study looks at how a hormone called GLP-1 helps control blood sugar and weight loss after gastric bypass surgery. Researchers will give a drug that blocks GLP-1 to 80 people, including those who had surgery and healthy controls, to measure its effects. The goal is to understand why some patients develop low blood sugar after surgery and how GLP-1 contributes to improved glucose metabolism.

What this could mean

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

Active substance
exendin-(9-39)
What this could lead to
If successful, this could clarify why some patients develop low blood sugar after gastric bypass and point toward better management strategies.
What could go wrong
This is an early-phase, observational study with only 80 participants. It is not testing a new treatment, so direct patient benefits are uncertain.

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

Early phase 1

The earliest testing in people: a first look at safety, in a very small group.

Participants

About 80 people

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

Start date

Nov 2005

Expected to finish

Aug 2027

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 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * age 18-65 * healthy control without diabetes or active organ disease * Individuals with bariatric surgery * recurrent hypoglycemia post gastric bypass Exclusion Criteria: * pregnancy * significant anemia * diabetes currently unless pre-op for bariatric surgery procedure * GI obstruction

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Conditions

The condition(s) this trial relates to.

dumping syndrome hypoglycemia

As listed by the trial registrant

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

Post-bariatric surgery

How to take part

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

  1. The places running it

    2 sites. 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

  • South Texas Veterans Health Care System

    RECRUITING

    San Antonio, Texas, 78229, United States

  • Texas Diabetes Institute - University Health System

    RECRUITING

    San Antonio, Texas, 78207, United States

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