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Efinopegdutide

Phase 2

Metabolic Dysfunction-Associated Steatotic Liver Disease | Small molecule | Metabolic |Merck & Company, Inc.|Trials Updated: Sep 21, 2026

Efinopegdutide development status

Highest phase Phase 2
Registered trials 12 across 3 sponsors since Aug 2016

Efinopegdutide target and mechanism

Molecular targetGCGR, GLP1R
Target classAgonist
ModalitySmall molecule

Also known as MK-6024, HM12525A, JNJ-64565111

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLED
Total Trials5
Total Enrollment757

FDA Designations

No designations recorded

Efinopegdutide clinical trials

Efinopegdutide · 5 trials · 10 indications

Phase 2 4Phase 1 1
NCT06482112Alternate Dosing Study of MK-6024 in Adults With Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD) (MK-6024-016)Metabolic Dysfunction-Associated Steatotic Liver Disease
COMPLETED124 Analytics
NCT06465186A Clinical Study of Efinopegdutide in People With Compensated Cirrhosis Due to Steatohepatitis (MK-6024-017)Non-alcoholic Fatty Liver Disease
COMPLETED85 Analytics
NCT05877547A Clinical Study of Efinopegdutide in Participants With Precirrhotic Nonalcoholic Steatohepatitis (NASH) (MK-6024-013)Non-alcoholic Fatty Liver Disease
COMPLETED381 Analytics
NCT04944992A Study of Efinopegdutide (MK-6024) in Participants With Nonalcoholic Fatty Liver Disease (NAFLD) (MK-6024-001)Nonalcoholic Fatty Liver Disease
COMPLETED145 Analytics
PHASE2COMPLETED
Alternate Dosing Study of MK-6024 in Adults With Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD) (MK-6024-016)
Metabolic Dysfunction-Associated Steatotic Liver DiseaseUnlock trial analytics
PHASE2COMPLETED
A Clinical Study of Efinopegdutide in People With Compensated Cirrhosis Due to Steatohepatitis (MK-6024-017)
Non-alcoholic Fatty Liver DiseaseUnlock trial analytics
PHASE2COMPLETED
A Clinical Study of Efinopegdutide in Participants With Precirrhotic Nonalcoholic Steatohepatitis (NASH) (MK-6024-013)
Non-alcoholic Fatty Liver DiseaseUnlock trial analytics
PHASE2COMPLETED
A Study of Efinopegdutide (MK-6024) in Participants With Nonalcoholic Fatty Liver Disease (NAFLD) (MK-6024-001)
Nonalcoholic Fatty Liver DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Mean Relative Reduction From Baseline in Liver Fat Content at Week 28
Baseline and Week 28

Liver fat content (LFC) was measured with liver images taken by magnetic resonance imaging estimated proton density fat fraction (MRI-PDFF) and analyzed by blinded independent central review (BICR). Relative Reduction from Baseline to Week 28 = (Baseline - Week 28) / Baseline x 100%. Least Squares (LS) Mean relative reduction from baseline in LFC is presented.

Percentage of Participants Who Experienced an Adverse Event (AE)
Up to Week 32

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 AE. The percentage of participants who experienced an AE is presented.

Percentage of Participants Who Discontinued Study Intervention Due to an AE
Up to Week 28

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 AE. The percentage of participants who discontinued study intervention due to an AE is presented.

Change from Baseline in Liver Fat Content (LFC) at Week 28
Baseline and 28 weeks

Researchers will measure the change in the amount of fat in the liver using magnetic resonance imaging (MRI) after about 7 months of treatment. The change in MRI-Estimated proton density fat fraction (PDFF) will be measured from baseline to 28 weeks.

Percentage of Participants Discontinuing Study Medication Due to an AE
Up to approximately 28 weeks

An AE is a health problem that happens or worsens during a study. The percentage of participants who stop study treatment due to an AE will be reported.

Percentage of Participants With Nonalcoholic Steatohepatitis (NASH) Resolution Without Worsening of Fibrosis At Week 52
Week 52

The NASH Clinical Research Network (CRN) scoring system evaluated by Blinded Independent Central Review (BICR) is used to assess treatment response. The NASH CRN scoring scales are: lobular inflammation score (0-3); hepatocyte ballooning score (0-2); steatosis score (0-3); and fibrosis score (0-4). NASH resolution is defined as a score of 0-1 for inflammation, 0 for ballooning, and any grade of steatosis.

Mean Relative Reduction From Baseline in Liver Fat Content (LFC) Measured by Magnetic Resonance Imaging-Estimated Proton Density Fat Fraction (MRI-PDFF), Evaluated by Blinded Independent Central Review (BICR) After 24 Weeks
Baseline and up to ~24 Weeks

LFC was measured with liver images taken by MRI-PDFF and analyzed by BICR. Relative Reduction from Baseline to Week 24 = (Baseline - Week 24) / Baseline x 100%. Mean relative reduction from baseline in liver fat content is presented.

Area Under the Curve From Time 0 to Infinity (AUC0-inf) of Efinopegdutide
At pre-specified timepoints on Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 11, Day 14, Day 21, and Day 35

Blood samples collected at multiple timepoints post-dose were used to determine the AUC0-inf.

Area Under the Curve From Time 0 to Last Sampling Time (AUC0-last) of Efinopegdutide
At pre-specified timepoints on Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 11, Day 14, Day 21, and Day 35

Blood samples collected at multiple timepoints post-dose were used to determine the AUC0-last.

Maximum Plasma Concentration (Cmax) of Efinopegdutide
At pre-specified timepoints on Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 11, Day 14, Day 21, and Day 35

Blood samples collected at multiple timepoints post-dose were used to determine the Cmax.

Time to Maximum Concentration (Tmax) of Efinopegdutide
At pre-specified timepoints on Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 11, Day 14, Day 21, and Day 35

Blood samples collected at multiple timepoints post-dose were used to determine the Tmax of efinopegdutide.

Apparent Terminal Half-life (t/12) of Efinopegdutide
At pre-specified timepoints on Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 11, Day 14, Day 21, and Day 35

Blood samples collected at multiple timepoints post-dose were used to determine the t1/2.

Apparent Total Clearance (CL/F) of Efinopegdutide
At pre-specified timepoints on Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 11, Day 14, Day 21, and Day 35

Blood samples collected at multiple timepoints post-dose were used to determine the CL/F.

Apparent Volume of Distribution (Vz/F) of Efinopegdutide
At pre-specified timepoints on Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 11, Day 14, Day 21, and Day 35

Blood samples collected at multiple timepoints post-dose were used to determine the Vz/F.

Secondary Endpoints

Mean Percent Change From Baseline in Body Weight at Week 28
Baseline and Week 28
Change from Baseline in Iron-corrected T1 (cT1) at Week 28
Baseline and up to 28 Weeks
Change from Baseline in Enhanced Liver Fibrosis (ELF) score at Week 28
Baseline and up to 28 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Efinopegdutide Q1W 10 mgACTIVE_COMPARATORParticipants will receive efinopegdutide Q1W via subcutaneous (SC) injection for 28 weeks in a dose-escalating regimen of 2 mg for 4 weeks, 4 mg for 4 weeks, 7 mg for 4 weeks, and 10 mg for up to 16 weeks.
Efinopegdutide Q2W 10 mgEXPERIMENTALParticipants will receive efinopegdutide Q2W via SC injection for 28 weeks in a dose-escalating regimen of 2 mg for 4 weeks, 4 mg for 4 weeks, 7 mg for 4 weeks, and 10 mg for up to 16 weeks.
Efinopegdutide Q2W 15 mgEXPERIMENTALParticipants will receive efinopegdutide Q2W via SC injection for 28 weeks in a dose-escalating regimen of 2 mg for 4 weeks, 4 mg for 4 weeks, 7 mg for 4 weeks, 10 mg for 4 weeks, and 15 mg for up to 12 weeks.
EfinopegdutideEXPERIMENTALParticipants will start efinopegdutide once a week at the lowest dose level. Then, the dose level will go up every month for three months until they are getting the highest dose level. Efinopegdutide is given as an injection under the skin (subcutaneous injection) for 28 weeks.
PlaceboPLACEBO_COMPARATORParticipants will receive placebo once a week. A placebo looks like the study medicine but has no study medicine in it. Using a placebo helps researchers better understand the effects of a study medicine. Placebo is given as an injection under the skin (subcutaneous injection) for 28 weeks.
Efinopegdutide 4mgEXPERIMENTALEfinopegdutide administered by subcutaneous (SC) injection once weekly for 52 weeks in a dose-escalation regimen of 2 mg for 4 weeks and 4mg for 48 weeks.
Efinopegdutide 7mgEXPERIMENTALEfinopegdutide administered by SC injection once weekly for 52 weeks in a dose-escalation regimen of 2 mg for 4 weeks, 4 mg for 4 weeks, and 7 mg for 44 weeks.
Efinopegdutide 10mgEXPERIMENTALEfinopegdutide administered by SC injection once weekly for 52 weeks in a dose-escalation regimen of 2 mg for 4 weeks, 4 mg for 4 weeks, 7 mg for 4 weeks, and 10 mg for 40 weeks.
Semaglutide 2.4 mgACTIVE_COMPARATORSemaglutide administered by SC injection once weekly for 52 weeks in a dose-escalation regimen of 0.25 mg for 4 weeks, 0.5 mg for 4 weeks, 1.0 mg for 4 weeks, 1.7 mg for 4 weeks, and 2.4 mg for 36 weeks.
SemaglutideACTIVE_COMPARATORSemaglutide 1.34 mg/mL administered by injection once weekly for 24 weeks in a dose-escalation regimen: 0.25 mg from day 1 to week 3, 0.5 mg from week 4 to 7, and 1.0 mg from week 8 to 24.
Efinopegdutide in Participants with Moderate Hepatic ImpairmentEXPERIMENTALParticipants with moderate hepatic impairment received a single 7 mg dose of efinopegdutide 14 mg/ml by subcutaneous (SC) injection.
Efinopegdutide in Participants with Severe Hepatic ImpairmentEXPERIMENTALParticipants with severe hepatic impairment received a single 7 mg dose of efinopegdutide 14 mg/ml by SC injection.
Efinopegdutide in Healthy-Matched Control GroupEXPERIMENTALHealthy matched participants received a single 7 mg dose of efinopegdutide 14 mg/ml by SC injection.

Interventions

NameTypeDescription
EfinopegdutideDRUGSC injections in dose-escalation regimens potentially including doses of 2 mg, 4 mg, 7 mg, and 10 mg in all arms and 15 mg in the Efinopegdutide Q2W 15 mg arm
PlaceboCOMBINATION_PRODUCTPlacebo is given as a subcutaneous injection using a single-use prefilled syringe once per week for 28 weeks.
SemaglutideDRUGSC injection in a dose-escalation regimen of 0.25 mg, 0.5 mg, 1.0 mg, 1.7 mg, and 2.4 mg
Efinopegdutide 20 mg/mLDRUGSubcutaneous injection in a dose-escalation administration of 2.4 mg, 5.0 mg, and 10.0 mg
Semaglutide 1.34 mg/mLDRUGSubcutaneous injection in a dose-escalation administration of 0.25 mg, 0.5 mg, and 1.0 mg
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites39

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Has body mass index (BMI) ≥25 kg/m\^2 (≥23 kg/m\^2 for Asian participants) AND has stable weight, defined as ≤5% gain or loss of body weight for at least 3 months before screening * Has no history of ty...

Countries:United StatesPuerto RicoAustraliaCanadaColombiaFranceIsraelJapanSpainThailandUnited KingdomAustriaBelgiumChileChinaCzechiaHong KongHungaryItalyMexicoPeruPortugalSingaporeSouth KoreaSwitzerlandTaiwanTurkey (Türkiye)ArgentinaNew ZealandPolandRussiaUkraine
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Recent Changes (Last 90 Days)

HIGHSep 21, 2026NCT06465186Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHSep 21, 2026NCT06465186Status: ACTIVE_NOT_RECRUITING → COMPLETED

Frequently asked questions about Efinopegdutide

What is efinopegdutide used for?

Efinopegdutide is an investigational drug being studied for metabolic dysfunction-associated steatotic liver disease (MASLD), non-alcoholic fatty liver disease (NAFLD), and non-alcoholic steatohepatitis (NASH). It is not yet approved for any indication and remains in clinical development.

What does efinopegdutide target?

Efinopegdutide targets both the glucagon receptor (GCGR) and the GLP-1 receptor (GLP1R), acting as an agonist at each. This dual agonist mechanism is designed to engage two metabolic pathways simultaneously, which is being explored for liver diseases such as MASLD and NASH.

Who is developing efinopegdutide?

Efinopegdutide is being developed by Merck & Company, Inc., which trades under the ticker MRK. Merck is the sponsor of the clinical trials evaluating the drug in metabolic liver diseases.

What phase is efinopegdutide in?

Efinopegdutide is in Phase 2 clinical development. It has completed two Phase 2 trials and one Phase 1 trial, with no active trials currently listed. The drug is investigational and has not been approved by the FDA for any indication.

What clinical trials is efinopegdutide in?

Efinopegdutide has been studied in completed trials including NCT06482112 (Phase 2, MASLD, 124 participants), NCT06465186 (Phase 2, compensated cirrhosis due to steatohepatitis, 85 participants), NCT06052566 (Phase 1, hepatic impairment, 22 participants), and NCT05877547 (Phase 2, precirrhotic NASH, 381 participants).