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MK-4082

Phase 1

Undisclosed | Small molecule | Other |Merck & Company, Inc.|Trials Updated: Sep 23, 2026

MK-4082 development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Feb 2026

MK-4082 target and mechanism

Molecular targetGLP-1
Target classReceptor
ModalitySmall molecule

Also known as MK-4082 Formulation 1 (F1), MK-4082 Formulation 1, MK-4082 Formulation 2 (F2), MK-4082 Formulation 2, MK-4082 Formulation 4 (F4), MK-4082 Formulation 4

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials3
Total Enrollment198

FDA Designations

No designations recorded

MK-4082 clinical trials

MK-4082 · 3 trials · 1 indication

Phase 1 3
NCT07748351A Clinical Trial of Multiple Formulations of MK-4082 in Healthy Overweight and Obese Participants (MK-4082-007)Healthy
ACTIVE NOT_RECRUITING48 Analytics
NCT07697625A Clinical Trial of MK-4082 in Healthy Participants (MK-4082-005)Healthy
RECRUITING28 Analytics
NCT07388667A Clinical Study of MK-4082 in Healthy Overweight Participants (MK-4082-002)Healthy
COMPLETED122 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Clinical Trial of Multiple Formulations of MK-4082 in Healthy Overweight and Obese Participants (MK-4082-007)
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PHASE1RECRUITING
A Clinical Trial of MK-4082 in Healthy Participants (MK-4082-005)
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PHASE1COMPLETED
A Clinical Study of MK-4082 in Healthy Overweight Participants (MK-4082-002)
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Study Endpoints

Primary Endpoints

Number of Participants Who Experience an Adverse Event (AE)
Up to approximately 8 weeks

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. The number of participants who experience an AE will be reported.

Number of Participants Who Discontinue Study Treatment Due to an AE
Up to approximately 6 weeks

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. The number of participants who discontinue study treatment due to an AE will be reported.

Part 1: Area Under the Concentration-Time Curve From Time 0 to Infinity (AUC0-∞) of MK-4082
At designated timepoints (up to approximately 1 week postdose)

Blood samples will be collected to determine the AUC0-∞ of MK-4082.

Part 1: Maximum Plasma Concentration (Cmax) of MK-4082
At designated timepoints (up to approximately 1 week postdose)

Blood samples will be collected to determine the Cmax of MK-4082.

Part 1: Number of Participants Who Experience an Adverse Event (AE)
Up to approximately 31 days

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. The number of participants who experience an AE will be reported.

Part 1: Number of Participants Who Discontinue Study Intervention Due to an AE
Up to approximately 17 days

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. The number of participants who discontinue study intervention due to an AE will be reported.

Secondary Endpoints

Area Under the Curve from Time 0 to 24 hours (AUC0-24) of MK-4082
At designated timepoints (up to 24 hours postdose)
Plasma Concentration at 24 Hours (C24) of MK-4082
At designated timepoints up to 24 hours postdose
Part 2: AUC0-∞ of MK-4082
At designated timepoints (up to approximately 1 week postdose)
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
Panel A Sequence 1EXPERIMENTALParticipants will be administered daily oral doses of MK-4082 formulation 1 (F1) and MK-4082 formulation 2 (F2) in a fixed sequence over the first 4 weeks, with only one formulation administered on any given day. In week 5, participants will be administered daily oral doses of MK-4082 F2 for 7 days followed by daily oral doses of MK-4082 F1 for 7 days.
Panel A Sequence 2EXPERIMENTALParticipants will be administered daily oral doses of MK-4082 F1 and MK-4082 F2 in a fixed sequence over the first 4 weeks, with only one formulation administered on any given day. In week 5, participants will be administered daily oral doses of MK-4082 F1 for 7 days followed by daily oral doses of MK-4082 F2 for 7 days.
Panel B Sequence 1EXPERIMENTALParticipants will be administered daily oral doses of MK-4082 F1 and MK-4082 formulation 4 (F4) in a fixed sequence over the first 4 weeks, with only one formulation administered on any given day. In week 5, participants will be administered daily oral doses of MK-4082 F4 for 7 days followed by daily oral doses of MK-4082 F1 for 7 days.
Panel B Sequence 2EXPERIMENTALParticipants will be administered daily oral doses of MK-4082 F1 and MK-4082 F4 in a fixed sequence over the first 4 weeks, with only one formulation administered on any given day. In week 5, participants will be administered daily oral doses of MK-4082 F1 for 7 days followed by daily oral doses of MK-4082 F4 for 7 days.
MK-4082EXPERIMENTALParticipants will move sequentially through 2 periods in Part 1. In Period 1, participants will receive a single oral dose of MK-4082 on Day 1. In Period 2, participants will receive a single oral dose of MK-4082 on Day 1 plus oral diltiazem for multiple days. In Part 2 participants receive a single dose of MK-4082 or placebo.
Panel A: Dose Escalation to Dosage 1EXPERIMENTALParticipants receive escalating doses of oral MK-4082 once daily (QD) or a dose-matched placebo to reach maintenance dose 1.
Panel B: Dose Escalation to Dosage 2EXPERIMENTALParticipants receive escalating doses of oral MK-4082 QD or a dose-matched placebo to reach maintenance dose 2.
Panel C: Dose Escalation to Dosage 3EXPERIMENTALParticipants receive escalating doses of oral MK-4082 once daily (QD) or a dose-matched placebo to reach maintenance dose 3.
Panel D: Dose Escalation to Dosage 4EXPERIMENTALParticipants receive escalating doses of oral MK-4082 once daily (QD) or a dose-matched placebo to reach maintenance dose 4.
Panel E: Dose Escalation to Dosage 5EXPERIMENTALParticipants receive escalating doses of oral MK-4082 once daily (QD) or a dose-matched placebo to reach maintenance dose 5.

Interventions

NameTypeDescription
MK-4082 Formulation 1 (F1)DRUGOral Tablet
MK-4082 Formulation 2 (F2)DRUGOral Tablet
MK-4082 Formulation 4 (F4)DRUGOral Tablet
MK-4082DRUGOral administration
DiltiazemDRUGOral administration
Rescue medicationDRUGAll participants will receive ondansetron as a rescue medication. Ondansetron is a medication used to prevent nausea or vomiting.
PlaceboDRUGOral Tablet
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Eligibility Criteria

Age Range18 Years to 60 Years
SexALL
Healthy VolunteersYes
Study Sites2

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Is in good health * Has a body mass index (BMI) between 25 and 40 kg/m\^2, inclusive and weighs at least 60 kg Exclusion Criteria: The main exclusion criteria include but are not limited to the follow...

Countries:United States
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Recent Changes (Last 90 Days)

MEDIUMSep 23, 2026NCT07748351Status: NOT_YET_RECRUITING → ACTIVE_NOT_RECRUITING
HIGHSep 23, 2026NCT07388667Status: ACTIVE_NOT_RECRUITING → COMPLETED
MEDIUMSep 23, 2026NCT07748351Status: NOT_YET_RECRUITING → ACTIVE_NOT_RECRUITING
HIGHSep 23, 2026NCT07388667Status: ACTIVE_NOT_RECRUITING → COMPLETED
LOWAug 28, 2026NCT07748351lastUpdatePostDate: changed
LOWAug 28, 2026NCT07748351lastUpdatePostDate: changed
LOWAug 5, 2026NCT07748351NEW_TRIAL: changed
LOWAug 5, 2026NCT07697625Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about MK-4082

What is MK-4082?

MK-4082 is an investigational small molecule developed by Merck & Company, Inc. (MRK). It is a GLP-1 receptor-targeted agent currently in Phase 1 clinical development. The specific medical conditions it is intended to treat have not been disclosed. It is being studied in healthy overweight and obese participants.

What does MK-4082 target?

MK-4082 targets the GLP-1 receptor. GLP-1 is a receptor involved in metabolic signaling, and MK-4082 is a small molecule designed to act at this target. This mechanism places it among GLP-1 receptor-directed therapies, a class being explored for weight and metabolic conditions.

Who makes MK-4082?

MK-4082 is developed by Merck & Company, Inc., which trades under the ticker MRK. Merck is running the clinical program, including Phase 1 trials in healthy participants and in healthy overweight and obese participants in the United States.

What phase is MK-4082 in?

MK-4082 is in Phase 1 clinical development. It is investigational and has not been approved by the FDA. Three Phase 1 trials have been registered, with two currently active and one completed, enrolling a total of 198 participants across the program.

What clinical trials is MK-4082 in?

MK-4082 has three registered Phase 1 trials. NCT07388667, in healthy overweight participants, is completed with 122 enrolled. NCT07748351, testing multiple formulations in healthy overweight and obese participants, is active but not recruiting with 48 enrolled. NCT07697625, in healthy participants, is recruiting with 28 enrolled.

Is MK-4082 the same as MK-4082 Formulation 1 or Formulation 2?

Yes. MK-4082 Formulation 1 (F1), MK-4082 Formulation 2 (F2), and MK-4082 Formulation 4 (F4) are alternative names referring to different formulations of the same investigational drug, MK-4082. One Phase 1 trial, NCT07748351, specifically evaluates multiple formulations of MK-4082 in healthy overweight and obese participants.