Study of Pembrolizumab (MK-3475) Plus Chemotherapy Versus Placebo Plus Chemotherapy for HR+/HER2- Locally Recurrent Inoperable or Metastatic Breast Cancer (MK-3475-B49/KEYNOTE-B49)

Last updated:
2026-09-26
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View trial details

Overview

Official protocol title:

A RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED, PHASE 3 STUDY OF PEMBROLIZUMAB PLUS CHEMOTHERAPY VERSUS PLACEBO PLUS CHEMOTHERAPY FOR THE TREATMENT OF CHEMOTHERAPY-CANDIDATE HORMONE RECEPTOR-POSITIVE, HUMAN EPIDERMAL GROWTH FACTOR RECEPTOR 2-NEGATIVE (HR+/HER2-) LOCALLY RECURRENT INOPERABLE OR METASTATIC BREAST CANCER (KEYNOTE-B49)

Intervention/treatment:
MK-3475 (PEMBROLIZUMAB)
Medical condition:
BREAST CANCER METASTATIC
Protocol code:
MK-3475-B49
Control number:
250598
Status:
Active, not recruiting
Approved:
April 27, 2021
Trial phase:
Phase 3
For more information:
ClinicalTrials.gov - NCT04895358
This is an external link. The information is not authorized by the Government of Canada.

Eligibility

Sex: ALL
Age
18 Years and older
Accepts healthy volunteers: No

Contacts and locations

Contact
Sponsor
MERCK CANADA INC

Locations

Alberta

Tom Baker Cancer Center ( Site 0107)
Calgary, Alberta, T2N 4N2

Ontario

North York General Hospital ( Site 0108)
Toronto, Ontario, M2K 1E1
Princess Margaret Cancer Centre ( Site 0101)
Toronto, Ontario, M5G 2M9

Quebec

Centre Hospitalier de l'Université de Montréal ( Site 0105)
Montreal, Quebec, H2X 3E4
Centre integre universitaire de sante et de services sociaux de la Mauricie-et-du-centre-du-quebec (
Trois-Rivières, Quebec, G8Z 3R9
Hopital Du Saint-Sacrement ( Site 0109)
Québec, Quebec, G1S 4L8
Jewish General Hospital ( Site 0110)
Montreal, Quebec, H3T 1E2
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