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Pembrolizumab/Vibostolimab

Phase 3

Metastatic Non-Small Cell Lung Cancer | Monoclonal antibody | Oncology |Merck & Company, Inc.|Last Updated: Feb 5, 2026

Target and mechanism

Molecular targetPDCD1
Target classInhibitor
ModalityMonoclonal antibody

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

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials2
Total Enrollment1,161

FDA Designations

PRIORITY_REVIEW

Clinical trial landscape

Pembrolizumab/Vibostolimab · 2 trials · 1 indication

Phase 3 2
NCT05226598Study of Pembrolizumab/Vibostolimab Coformulation (MK-7684A) in Combination With Chemotherapy Versus Pembrolizumab Plus Chemotherapy in Participants With Metastatic Non-Small Cell Lung Cancer (MK-7684A-007/KEYVIBE-007)Metastatic Non-Small Cell Lung Cancer
COMPLETED739 Analytics
NCT03976375Efficacy and Safety of Pembrolizumab (MK-3475) With Lenvatinib (E7080/MK-7902) vs. Docetaxel in Participants With Metastatic Non-Small Cell Lung Cancer (NSCLC) and Progressive Disease (PD) After Platinum Doublet Chemotherapy and Immunotherapy (MK-7902-008/E7080-G000-316/LEAP-008)Metastatic Non-Small Cell Lung Cancer
COMPLETED422 Analytics
PHASE3COMPLETED
Study of Pembrolizumab/Vibostolimab Coformulation (MK-7684A) in Combination With Chemotherapy Versus Pembrolizumab Plus Chemotherapy in Participants With Metastatic Non-Small Cell Lung Cancer (MK-7684A-007/KEYVIBE-007)
Metastatic Non-Small Cell Lung CancerUnlock trial analytics
PHASE3COMPLETED
Efficacy and Safety of Pembrolizumab (MK-3475) With Lenvatinib (E7080/MK-7902) vs. Docetaxel in Participants With Metastatic Non-Small Cell Lung Cancer (NSCLC) and Progressive Disease (PD) After Platinum Doublet Chemotherapy and Immunotherapy (MK-7902-008/E7080-G000-316/LEAP-008)
Metastatic Non-Small Cell Lung CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Overall Survival (OS) in Participants With Programmed Cell Death-Ligand 1 (PD-L1) Tumor Proportion Score (TPS) ≥1%
Up to approximately 29 months

OS is defined as the time from the date of randomization to death due to any cause. The OS is reported for all participants with PD-L1 positive tumors (PD-L1 TPS≥1%). The OS was calculated using the product-limit (Kaplan-Meier) method for censored data.

Overall Survival (OS)
Up to ~47 months

OS is defined as the time from randomization to the date of death due to any cause.

Progression-free Survival (PFS) Per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1)
Up to ~47 months

PFS is defined as the time from randomization to the first documented progressive disease (PD) or death due to any cause, whichever occurs first. Per RECIST 1.1, PD is defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. Note: The appearance of one or more new lesions is also considered PD. PFS was assessed by blinded independent central review (BICR) per RECIST 1.1, modified to follow a maximum of 10 target lesions and a maximum of 5 target lesions per organ.

Secondary Endpoints

Overall Survival (OS) in All Participants
Up to approximately 29 months
Progression-Free Survival (PFS)
Up to approximately 29 months
Objective Response Rate (ORR)
Up to approximately 29 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
MK-7684A + ChemotherapyEXPERIMENTALParticipants receive pembrolizumab/vibostolimab (co-formulation of 200mg pembrolizumab and 200 mg vibostolimab) via intravenous (IV) infusion on Day 1 of each cycle (cycle length = 3 weeks) for up to 35 cycles (up to \~2 years) PLUS paclitaxel IV (on Day 1 of each cycle) OR nab-paclitaxel IV (on Days 1, 8, and 15 of each cycle) and carboplatin IV (on Day 1 of each cycle) for 4 cycles for Squamous NSCLC; PLUS carboplatin IV (on Day 1 of each cycle) Or cisplatin IV (on Day 1 of each cycle) for 4 cycles and pemetrexed IV (on Day 1 of each cycle) until progression, intolerable adverse events, or participant/physician decision for Non-squamous.
Pembrolizumab + ChemotherapyACTIVE_COMPARATORParticipants receive pembrolizumab 200 mg via IV infusion on Day 1 of each cycle (cycle length = 3 weeks) for up to 35 cycles (up to \~2 years) PLUS paclitaxel IV (on Day 1 of each cycle) OR nab-paclitaxel IV (on Days 1, 8, and 15 of each cycle) and carboplatin IV (on Day 1 of each cycle) for 4 cycles for Squamous NSCLC; PLUS carboplatin IV (on Day 1 of each cycle) Or cisplatin IV (on Day 1 of each cycle) for 4 cycles and pemetrexed IV (on Day 1 of each cycle) until progression, intolerable adverse events, or participant/physician decision for Non-squamous.
Pembrolizumab+LenvatinibEXPERIMENTALParticipants receive pembrolizumab at 200 mg, every 3 weeks (Q3W) via intravenous (IV) infusion on Day 1 of each 21-day cycle, in combination with lenvatinib at 20 mg, once daily (QD) via oral capsule. Pembrolizumab will be administered for up to 35 treatment cycles (\~2 years). Lenvantinib will be administered until progressive disease or unacceptable toxicity.
DocetaxelACTIVE_COMPARATORParticipants receive docetaxel at 75 mg/m\^2, Q3W via IV infusion over 1-hour infusion on Day 1 of each 21-day cycle. Docetaxel will be administered until progressive disease or unacceptable toxicity.
Lenvatinib MonotherapyEXPERIMENTALParticipants receive lenvatinib at 24 mg, QD via oral capsule. Lenvantinib will be administered until progressive disease or unacceptable toxicity.

Interventions

NameTypeDescription
Pembrolizumab/VibostolimabBIOLOGICALCo-formulation of pembrolizumab 200 mg/20 mL vial and vibostolimab 200 mg administered as IV infusion for up to 35 administrations
CarboplatinDRUGCarboplatin 10 mg/ml administered as IV infusion Q3W for 4 administrations
CisplatinDRUGCisplatin 1 mg/ml administered as IV infusion Q3W for 4 administrations
PaclitaxelDRUGPaclitaxel 6mg/ml administered as IV infusion Q3W for 4 administrations
Nab-paclitaxelDRUGNab-paclitaxel 100 mg/vial administered as IV infusion Days 1, 8, and 15 of each 21-day cycle for 4 administrations
PemetrexedDRUGPemetrexed 500 mg/vial administered as IV infusion Q3W until progression, intolerable adverse event (AE), or participant or physician decision
PembrolizumabBIOLOGICALPembrolizumab 25 mg/mL administered as IV infusion Q3W for up to 35 administrations
LenvatinibDRUGOral capsules (unit strength: 4 and 10 mg) at 20 mg or 24 mg total daily dose.
DocetaxelDRUGIV infusion of docetaxel at 75 mg/m\^2.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites149

The main inclusion and exclusion criteria include but are not limited to the following: Inclusion Criteria: * A histologically or cytologically confirmed diagnosis of Stage IV squamous or non-squamous NSCLC * Has not received prior systemic treatment for metastatic NSCLC * Has measurable disease b...

Countries:United StatesArgentinaAustriaBrazilChileChinaColombiaFranceGermanyIsraelJapanMexicoPolandSouth KoreaSpainTaiwanThailandTurkey (Türkiye)United KingdomAustraliaCanadaGreeceHungaryItalyPortugalPuerto RicoRussia
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Competitive Landscape -Non-Small Cell Lung Cancer 389 trials (matched to "Metastatic Non-Small Cell Lung Cancer")

Frequently asked questions about Pembrolizumab/Vibostolimab

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.