Phase 3 study for people with Breast Cancer

Recruiting Phase 3

Sources: ClinicalTrials.gov Checked: 15 October 2026 Not medical advice

This trial at a glance

Status Recruiting
Phase Phase 3
Sponsor Merck Sharp & Dohme LLC
Registry number NCT06312176
Started 14 April 2024 Today 16 October 2026 Estimated completion 11 July 2027

Where this trial is running

Trial sites and the status recorded for each
SiteCityState or countryStatus at this site
Macquarie University-MQ Health Clinical Trials Unit ( Site 2002) Macquarie University NSW Recruiting
Westmead Hospital ( Site 2000) Westmead NSW Recruiting
Frankston Hospital-Oncology and Haematology ( Site 2003) Frankston VIC Completed
Fiona Stanley Hospital-Medical Oncology ( Site 2004) Murdoch WA Recruiting

voxsanity.com.au · trial sites from public registries · registry record synced 15 October 2026 · not medical advice

Who can join

Age 18 Years and over
Sex Anyone, regardless of sex
Healthy volunteers Not accepted
Enrolment target 1200

The official eligibility criteria

Registry text, reproduced exactly. These are the words the trial's sponsor published on ClinicalTrials.gov. They have not been edited, shortened or rewritten, and they are written for researchers rather than for patients.

Inclusion Criteria:

* Has unresectable locally advanced or metastatic centrally-confirmed hormone receptor positive (HR+)/human epidermal growth factor receptor 2 negative (HER2-) breast cancer

* Has radiographic disease progression on one or more lines of endocrine therapy for unresectable locally advanced/metastatic HR+/HER2- breast cancer, with one in combination with a CDK4/6 inhibitor

* Is a chemotherapy candidate

* Has an eastern cooperative oncology group (ECOG) performance status of 0 to 1 assessed within 7 days before randomization

* Has adequate organ function

* Human immunodeficiency virus (HIV)-infected participants must have well controlled HIV on antiretroviral therapy

* Participants who are Hepatitis B surface antigen (HBsAg) positive are eligible if they have received HBV antiviral therapy for at least 4 weeks, and have undetectable HBV viral load

* Participants with a history of Hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable

Exclusion Criteria:

* Has breast cancer amenable to treatment with curative intent

* Has experienced an early recurrence (\<6 months after completing adjuvant/neoadjuvant chemotherapy) and therefore is eligible to receive second-line (2L) treatment

* Has symptomatic advanced/metastatic visceral spread at risk of rapidly evolving into life-threatening complications

* Has received prior chemotherapy for unresectable locally advanced or metastatic breast cancer

* Active autoimmune disease that has required systemic treatment in the past 2 years

* History of (noninfectious) pneumonitis/interstitial lung disease that requires steroids, or has current pneumonitis/interstitial lung disease

* Has an active infection requiring systemic therapy

Dates on the record

Started 14 April 2024
Estimated completion 11 July 2027
Registry last updated 13 October 2026
Checked by Voxsanity 15 October 2026

Results, publications and the official record

Sources and dates

  • ClinicalTrials.gov – the record this page reformats
  • ClinicalTrials.gov processing date: 13 October 2026.
  • This page last checked by Voxsanity: 15 October 2026.

Voxsanity reformats data from public registries into this layout. It does not edit, interpret or add to what the registry published.

Not medical advice.

Individual trial records are refreshed on a rolling basis rather than all at once, so a record may be up to several weeks old. Each trial page and trial card shows the date its own record was last synced. Where a record has lagged, its status, sites and enrolment can differ from the current registry state in either direction, so check the registry link on the trial page before acting on them.

Letter for your doctor

A one-page summary of this trial to print or email to your GP. It carries the registry's own record of the trial and its eligibility criteria, and nothing Voxsanity has written about whether it suits you.