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Pembrolizumab/ml

Phase 3

Triple-negative Breast Cancer | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: Sep 3, 2026

Target and mechanism

Molecular targetPDCD1
Target classInhibitor
ModalitySmall molecule

Also known as Pembrolizumab, MK-3475, pembrolizumab, KEYTRUDA®, KEYTRUDA, Pembrolizumab Injection [Keytruda], Pembrolizumab (Keytruda), Pembrolizumab (MK-3475)

Success Probability

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Market & Valuation

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Trial Design

RandomizedNO_TREATMENT_CONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment1,884

FDA Designations

PRIORITY_REVIEW

Clinical trial landscape

Pembrolizumab/ml · 2 trials · 1 indication

Phase 3 1Phase 2 1
NCT06393374Sacituzumab Tirumotecan (MK-2870) Plus Pembrolizumab Versus TPC in TNBC Who Did Not Achieve pCR (MK-2870-012)Triple-Negative Breast Cancer
RECRUITING1,530 Analytics
PHASE3RECRUITING
Sacituzumab Tirumotecan (MK-2870) Plus Pembrolizumab Versus TPC in TNBC Who Did Not Achieve pCR (MK-2870-012)
Triple-Negative Breast CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Invasive Disease-Free Survival (iDFS)
Up to ~77 months

iDFS is the time from randomization to invasive local, regional, or distant recurrence, invasive contralateral breast cancer, or death due to any cause, whichever occurs first.

Distant disease-free survival (DDFS)
5 year

Distant disease-free survival is defined as the delay between date of inclusion and distant tumor relapse, second cancer, or death from any cause, whichever occurs first.

Secondary Endpoints

Overall Survival (OS)
Up to ~101 months
Distant recurrence-free survival (DRFS)
Up to ~101 months
Change from baseline in European Organization for the Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Global Health Status (Item 29) and Quality of Life (Item 30) Combined Score
Baseline and up to ~60 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Pembrolizumab + sacituzumab tirumotecanEXPERIMENTALParticipants receive pembrolizumab every 6 weeks (q6w) in combination with sacituzumab tirumotecan every 2 weeks (q2w) for 24 weeks. In addition, participants receive an antihistamine, an H2 antagonist of investigator's choice, acetaminophen (or equivalent), and dexamethasone (or equivalent) per each drug's product label prior to sacituzumab tirumotecan infusions.
Treatment of Physician's ChoiceACTIVE_COMPARATORParticipants receive pembrolizumab q6w or pembrolizumab q6w in combination with capecitabine (twice daily \[BID\] on Days 1 to 14 and 22 to 35 every 42 days x 4 \[2 weeks 1, 1 week off\]) for 24 weeks.
Cohort 1-Pembrolizumab plus PaclitaxelEXPERIMENTALPembrolizumab will be administered at a fixed dose of 200 mg every 3 weeks (Q3W), with a total of 9 cycles and Paclitaxel 80 mg/m² weekly for 12 cycles
Cohort 2-ObservationNO_INTERVENTIONNo treatment will be administered, patients will undergo standard surveillance every 6 months according to local practice.

Interventions

NameTypeDescription
PembrolizumabBIOLOGICALPembrolizumab 400 mg intravenous (IV) infusion q6w
Sacituzumab tirumotecanBIOLOGICALSacituzumab tirumotecan 4 mg/kg IV infusion q2w
CapecitabineDRUGCapecitabine 1000 mg/m\^2 to 1250 mg/m\^2 by mouth BID
Pembrolizumab 25 mg/mlDRUGPembrolizumab drug product is a sterile-filtered liquid and is aseptically filled into single-use vials. The vials contain 4 mL of sterile solution for IV infusion.
Paclitaxel injectionDRUGInjectable solution for IV administration. Dose of 80 mg/m² weekly.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites310

Inclusion Criteria: * Has centrally confirmed TNBC, as defined by the most recent American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) guidelines * Has no evidence of locoregional or distant relapse, as assessed by the treating physician * Had neoadjuvant treatment base...

Countries:United StatesArgentinaAustraliaAustriaBelgiumBrazilCanadaColombiaCzechiaDenmarkFinlandFranceGermanyGreeceHong KongIrelandIsraelItalyJapanMalaysiaMexicoNorwayPolandPortugalSingaporeSouth KoreaSpainSwedenSwitzerlandTurkey (Türkiye)United Kingdom
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Recent Changes (Last 90 Days)

LOWSep 3, 2026NCT06393374lastUpdatePostDate: changed
LOWSep 3, 2026NCT06393374lastUpdatePostDate: changed
LOWAug 28, 2026NCT06393374lastUpdatePostDate: changed
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Frequently asked questions about Pembrolizumab/ml

What is MK-3475 used for?

MK-3475, also known as pembrolizumab and marketed as KEYTRUDA, is an investigational antibody being studied for several oncology indications, including Primary Mediastinal Large B-cell Lymphoma (PMBCL), prostate cancer, anal cancer, squamous cell carcinoma, non-small-cell lung cancer, B-cell lymphoma, and oligometastatic squamous cell carcinoma of the head and neck.

What does MK-3475 target?

MK-3475 is a monoclonal antibody (target class -mab) that targets the PD-1 receptor. By binding to PD-1, it is designed to block the interaction with its ligands, potentially enhancing the immune system's ability to fight cancer cells.

Who makes MK-3475?

MK-3475 is developed by Merck & Company, Inc., which trades under the ticker MRK. Merck is conducting clinical trials to evaluate the drug's safety and efficacy across multiple cancer types.

What phase is MK-3475 in?

MK-3475 is in Phase 1 clinical development. It has received a Priority Review designation from the FDA. The drug is investigational and not yet approved, with ongoing trials assessing its use in various cancers.

What clinical trials is MK-3475 in?

MK-3475 is being studied in 17 clinical trials, with 5 active and 12 completed, enrolling over 8,000 participants. Notable trials include NCT02635360 for cervical cancer, NCT04875195 for Hodgkin's lymphoma and PMBCL, NCT04976634 for solid tumors, and NCT05815927 for head and neck cancer.

Is MK-3475 the same as pembrolizumab?

Yes, MK-3475 is the same as pembrolizumab, which is also known by the brand name KEYTRUDA. The drug is referred to by multiple names including Pembrolizumab 200 mg, Pembrolizumab Injection, and Pembrolizumab (MK-3475), among others.