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MK-1484

Phase 1

Advanced or Metastatic Solid Tumors | Monoclonal antibody | Oncology |Merck & Company, Inc.|Last Updated: Aug 10, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment70

FDA Designations

No designations recorded

Clinical trial landscape

MK-1484 · 1 trial · 1 indication

Phase 1 1
NCT05382325A Study of MK-1484 as Monotherapy and in Combination With Pembrolizumab (MK-3475) In Advanced or Metastatic Solid Tumors (MK-1484-001)Advanced or Metastatic Solid Tumors
ACTIVE NOT_RECRUITING70 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study of MK-1484 as Monotherapy and in Combination With Pembrolizumab (MK-3475) In Advanced or Metastatic Solid Tumors (MK-1484-001)
Advanced or Metastatic Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants with a Dose-Limiting Toxicity (DLT) Graded Using National Cancer Institute Common Terminology Criteria for Adverse Events (AEs) Version 5.0
Cycle 1 (Up to 21 days)

DLT is defined as any of the following toxicities, if assessed by the investigator to be related to study treatment: Grade (Gr) 4 nonhematologic toxicity (not laboratory); Gr 4 hematologic toxicity lasting ≥7 days, except thrombocytopenia: Gr 4 thrombocytopenia of any duration; Gr 3 thrombocytopenia associated with clinically significant bleeding; Gr 4 anemia regardless of duration; Nonhematologic AE Gr ≥3 in severity, with exceptions; Any Gr 3 or 4 nonhematologic laboratory abnormality if: clinically significant medical intervention is required, or if abnormality leads to hospitalization, persists for \>1 week or results in drug-induced liver injury with exceptions; Gr 3 or Gr 4 febrile neutropenia; Prolonged delay (\>2 weeks) in initiating Cycle 2 due to treatment-related toxicity; Treatment-related toxicity resulting in participant study treatment discontinuation during Cycle 1; Missing \>25% of the MK-1484 dose during Cycle 1 resulting from treatment-related AE; Gr 5 toxicity.

Number of Participants Who Experience At Least One AE
Up to approximately 27 months

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who experienced an AE will be reported.

Number of Participants Who Discontinue Study Treatment Due to an AE
Up to approximately 24 months

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who discontinued study treatment due to an AE will be reported.

Secondary Endpoints

Area Under the Curve (AUC) of MK-1484
At designated time points (Up to approximately 24 months)
Minimum Serum Concentration (Cmin) of MK-1484
At designated time points (Up to approximately 24 months)
Maximum Serum Concentration (Cmax) of MK-1484
At designated time points (Up to approximately 24 months)
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
MK-1484EXPERIMENTALParticipants will receive MK-1484 every 3 weeks (Q3W) or 21-day cycle at escalating dose levels from 0.2-60 mg for up to a total of 35 cycles (up to approximately 24 months).
MK-1484 + PembrolizumabEXPERIMENTALParticipants will receive MK-1484 Q3W at escalating dose levels from 10-60 mg plus pembrolizumab 200 mg once every 21-day cycle for up to a total of 35 cycles (up to approximately 24 months).

Interventions

NameTypeDescription
MK-1484BIOLOGICALSubcutaneous (SC) injection
PembrolizumabBIOLOGICALIntravenous (IV) infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites8

The main inclusion and exclusion criteria include but are not limited to the following: Inclusion Criteria: * Has a histologically- or cytologically-confirmed advanced/metastatic solid tumor by pathology report and has received, or been intolerant to, all treatment known to confer clinical benefit...

Countries:United StatesCanadaIsraelNetherlands
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Advanced or Metastatic Solid Tumors")

Recent Changes (Last 90 Days)

LOWAug 11, 2026NCT05382325primaryCompletionDate: changed
LOWAug 11, 2026NCT05382325primaryCompletionDate: changed
LOWAug 11, 2026NCT05382325primaryCompletionDate: changed

Frequently asked questions about MK-1484

What is MK-1484 used for in advanced or metastatic solid tumors?

MK-1484 is an investigational monoclonal antibody being studied for the treatment of advanced or metastatic solid tumors. It is currently in Phase 1 clinical development as a monotherapy and in combination with pembrolizumab (MK-3475) for this patient population.

What does MK-1484 target?

MK-1484 is a monoclonal antibody, but its specific molecular target has not been disclosed in the available information. The drug is being evaluated in a Phase 1 clinical trial for advanced or metastatic solid tumors.

Who makes MK-1484?

MK-1484 is being developed by Merck & Company, Inc., which is publicly traded under the ticker symbol MRK. The company is conducting a Phase 1 clinical trial of MK-1484 as a monotherapy and in combination with pembrolizumab.

What phase is MK-1484 in?

MK-1484 is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. The ongoing Phase 1 trial is studying MK-1484 in patients with advanced or metastatic solid tumors.

What clinical trials is MK-1484 in?

MK-1484 is being studied in a Phase 1 clinical trial with the identifier NCT05382325. This trial, titled 'A Study of MK-1484 as Monotherapy and in Combination With Pembrolizumab (MK-3475) In Advanced or Metastatic Solid Tumors (MK-1484-001)', is active but not recruiting and has an enrollment of 70 participants.

Is MK-1484 the same as pembrolizumab?

No, MK-1484 is not the same as pembrolizumab. MK-1484 is an investigational monoclonal antibody being studied as a monotherapy and in combination with pembrolizumab (MK-3475) in a Phase 1 clinical trial for advanced or metastatic solid tumors.