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Pembrolizumab/vibostolimab coformulation

Phase 2

Hematological Malignancies | Monoclonal antibody | Other |Merck & Company, Inc.|Last Updated: Feb 19, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment192
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05005442A Study of Pembrolizumab/Vibostolimab (MK-7684A) in Relapsed/Refractory Hematological Malignancies (MK-7684A-004, KEYVIBE-004)PHASE2 COMPLETED 192Sep 28, 2021Dec 10, 2024Feb 19, 202665 United States, Brazil +14
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Study Endpoints
Primary Endpoints
Percentage of Participants With a Dose-Limiting Toxicity (DLT)
Up to approximately 6 weeks

A DLT is defined as an event with toxicity including the type, severity, time of onset, time of resolution, and the probable association with study treatment that are not due to pre-existing conditions as defined by the Common Terminology Criteria for Adverse Events Version 5.0 (CTCAE 5.0). Percentage of participants who experience a DLT per CTCAE 5.0 are reported.

Percentage of Participants Who Experienced an Adverse Event (AE)
Up to approximately 27 months

An AE is any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a preexisting condition that is temporally associated with the use of the Sponsor's product, is also an adverse event. The number of participants who experience an AE are reported.

Percentage of Participants Who Discontinued Study Treatment Due to an AE
Up to approximately 24 months

An AE is any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a preexisting condition that is temporally associated with the use of the Sponsor's product, is also an adverse event. The number of participants discontinued from the study treatment due to an AE are reported.

Secondary Endpoints
Objective Response Rate (ORR) as Assessed by Lugano 2014 Classification (Cohorts A-D & F)
Up to approximately 37 months
ORR as Assessed by the 2016 International Myeloma Working Group (IMWG) Response Criteria (Cohort E)
Up to approximately 37 months
Duration of Response (DOR) as Assessed by Lugano 2014 Classification (Cohorts A-D & F)
Up to approximately 37 months
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Pembrolizumab/vibostolimab coformulationEXPERIMENTALParticipants will receive pembrolizumab/vibostolimab (coformulation of 200 mg pembrolizumab and 200 mg vibostolimab) via intravenous IV infusion once every 3 weeks (Q3W) for up to 35 cycles up to approximately 2 years.
Interventions
NameTypeDescription
Pembrolizumab/vibostolimab coformulationBIOLOGICALPembrolizumab 200 mg + vibostolimab 200 mg/20 mL vial IV infusion Q3W up to approximately 2 years.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites65

Inclusion Criteria \- Have confirmed relapsed/refractory classic Hodgkins Lymphoma (cHL), Primary mediastinal B-cell lymphoma (PMBCL), Follicular Lymphoma (FL), Diffuse large B-cell lymphoma (DLBCL) or Non-Hodgkins Lymphoma (NHL), or multiple myeloma (MM). For PMBCL, DLBCL, FL, and MM: \- Must be...

Countries:United StatesBrazilCanadaChileDenmarkFranceGermanyHungaryIsraelItalyPolandRussiaSpainTaiwanTurkey (Türkiye)Ukraine
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