Tirzepatide's Role in Postmenopausal HR+ Breast Cancer Survivors

July 21, 2026 updated by: Weill Medical College of Cornell University
This study will explore whether tirzepatide is a practical and acceptable treatment for postmenopausal females with a history of hormone receptor-positive breast cancer and obesity. The investigators aim to understand whether participants are willing and able to take this medication once weekly for 6 months and whether it may help improve weight and overall health. There will be monthly check-ins to monitor progress and safety. At the beginning and end of the study, participants will undergo body composition assessments, blood tests and a stool sample will be collected, and surveys will be completed.

Study Overview

Status

Status

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

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.

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 (Estimated)

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.
30

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 4

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 Contact Backup

Study Locations

  • United States
    • New York
      • New York, New York, United States, 10021
        • Recruiting
        • Weill Cornell Medicine
        • Contact:

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Biologically female
  • Age ≥ 18
  • Obesity as defined by current BMI ≥ 30 kg/m² or ≥ 27.5 kg/m² for individuals of Asian ancestry

  • Postmenopausal as defined by one or more of the following

    • Age ≥60 years
    • Age <60 years with amenorrhea for ≥ 1 year
    • Documented bilateral surgical oophorectomy
    • Chemical menopause with the addition of LHRH agonists at least 12 weeks prior to enrolment, and plan to remain on LHRH agonists throughout the trial
  • HR+ (ER and/or PR) stage 0-III breast cancer
  • Completed curative treatment (surgery, chemotherapy, radiotherapy) at least 12 weeks prior to enrolment
  • Insurance approval for tirzepatide or willing to pay out of pocket
  • Willing to provide informed consent and comply with study procedures

Exclusion Criteria:

  • Stage IV breast cancer
  • Concomitant use of CDK inhibitors
  • Concomitant use of antiHER2 therapy
  • The PI may be consulted regarding enrollment of females receiving other endocrine therapy medications
  • Other active malignancy requiring treatment
  • Enrollment in another investigational clinical trial
  • Contraindication to tirzepatide
  • Treatment with a GLP-1 receptor agonist within the last 3 months
  • Diabetes requiring insulin
  • Any disorder, unwillingness, or inability, not covered by any of the other exclusion criteria, which in the investigator's opinion, might jeopardize the subject's safety or compliance with the protocol

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

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.
Experimental: Drug
Drug: Tirzepatide
Participants will take tirzepatide weekly for 24 weeks. The dose will be adjusted on a monthly basis as clinically indicated.

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
Percentage of participants completing week 24 visit with all required assessments
Time Frame: 24 weeks
24 weeks

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
Measure Description
Time Frame
Percent change in body weight from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Absolute change in visceral fat mass from baseline to week 24
Time Frame: Baseline, 24 weeks
As assessed by SECA scan
Baseline, 24 weeks
Percent change in visceral fat mass from baseline to week 24
Time Frame: Baseline, 24 weeks
As assessed by SECA scan
Baseline, 24 weeks
Absolute change in fasting glucose from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Percent change in fasting glucose from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Absolute change in fasting insulin from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Percent change in fasting insulin from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Absolute change in hemoglobin A1c from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Percent change in hemoglobin A1c from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Absolute change in IGF-1 from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Percent change in IGF-1 from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Absolute change in leptin from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Percent change in leptin from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Absolute change in adiponectin from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Percent change in adiponectin from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Absolute change in hs-CRP from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Percent change in hs-CRP from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Absolute change in ghrelin from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks
Percent change in ghrelin from baseline to week 24
Time Frame: Baseline, 24 weeks
Baseline, 24 weeks

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.
Weill Medical College of Cornell University

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
National Center for Advancing Translational Sciences (NCATS)

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Sarah Schmitz, MD, Weill Medical College of Cornell University

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.
June 8, 2026

Primary Completion (Estimated)

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.
December 3, 2027

Study Completion (Estimated)

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.
February 25, 2028

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).
November 20, 2025

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.
November 20, 2025

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.
December 2, 2025

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.
July 22, 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.
July 21, 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.
July 1, 2026

More Information

Terms related to this study

Keywords

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.
  • 25-06029016
  • KL2TR002385 (U.S. NIH Grant/Contract)

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

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings