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Enpatoran

Phase 3

Systemic Lupus Erythematosus (SLE) | Small molecule | Immunology |Merck & Company, Inc.|Last Updated: Aug 14, 2026

Target and mechanism

Molecular targetTLR7, TLR8
Target classAntagonist
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment202

FDA Designations

BREAKTHROUGH_THERAPY

Clinical trial landscape

Enpatoran · 2 trials · 3 indications

Phase 3 1Phase 1 1
NCT07332481A Study of Enpatoran in Participants With Cutaneous Manifestations of Lupus With or Without Systemic DiseaseSystemic Lupus Erythematosus (SLE)
RECRUITING202 Analytics
PHASE3RECRUITING
A Study of Enpatoran in Participants With Cutaneous Manifestations of Lupus With or Without Systemic Disease
Systemic Lupus Erythematosus (SLE)Unlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Participants With Cutaneous Lupus Erythematosus Disease Area and Severity Index (CLASI) 70 Response, Defined as >= 70 Percent (%) Decrease in CLASI-A Score From Baseline
At Week 24
Pharmacokinetic (PK) Plasma Concentrations of Enpatoran
Predose, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, and 48 hours postdose

Secondary Endpoints

Percentage of Participants With British Isles Lupus Assessment Group Based Composite Lupus Assessment (BICLA) Response
At Week 24
Number of Participants With Treatment Emergent adverse events (TEAEs), Serious Adverse Events (SAEs), and Adverse Events of Special Interest (AESI)
From Day 1 to Week 24
Number of Participants With Abnormal (greater than and equal to [>=] Grade 3) laboratory parameters
From Day 1 to Week 24
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
EnpatoranEXPERIMENTAL -
PlaceboPLACEBO_COMPARATOR -
Control Group 1 (Normal Renal Function)EXPERIMENTAL -
Group 2 (Impaired Renal Function)EXPERIMENTAL -

Interventions

NameTypeDescription
EnpatoranDRUGParticipants will receive a dose of Enpatoran orally twice daily from Day 1 to Day 168.
PlaceboDRUGParticipants will receive a single oral dose of a placebo matching Enpatoran tablet twice daily from Day 1 to Day 168.
Standard of care (SoC)DRUGParticipants will receive Investigator-recommended SoC.
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites18

Inclusion Criteria * Vaccinations are up to date according to local guidelines/recommendations. Recombinant zoster vaccination is encouraged but not mandatory. * Participants with diagnosis of Discoid Lupus Erythematosus (DLE) and/or Subacute Cutaneous Lupus Erythematosus (SCLE) documented in medic...

Countries:United StatesJapanSwitzerlandGermany
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Recent Changes (Last 90 Days)

LOWAug 14, 2026NCT07332481lastUpdatePostDate: changed
LOWAug 14, 2026NCT07332481lastUpdatePostDate: changed
LOWJul 24, 2026NCT07332481lastUpdatePostDate: changed
LOWJul 24, 2026NCT07332481lastUpdatePostDate: changed
LOWJul 5, 2026NCT07332481primaryCompletionDate: changed
LOWJul 5, 2026NCT07332481primaryCompletionDate: changed
LOWJul 5, 2026NCT07332481primaryCompletionDate: changed

Frequently asked questions about Enpatoran

What is Enpatoran used for?

Enpatoran is an investigational small molecule being developed for renal impairment and systemic lupus erythematosus (SLE). It is also being studied in cutaneous lupus erythematosus (CLE) with or without systemic disease. The drug is in clinical development and has not been approved by the FDA.

Who makes Enpatoran?

Enpatoran is being developed by Merck & Company, Inc., traded on the New York Stock Exchange under the ticker MRK. The company is conducting clinical trials to evaluate the drug's safety and efficacy in renal impairment and lupus indications.

What phase is Enpatoran in?

Enpatoran is in Phase 1 clinical development for renal impairment, with a completed pharmacokinetic study. Additionally, a Phase 3 trial is recruiting participants with cutaneous manifestations of lupus, with or without systemic disease. The drug is investigational and not yet FDA approved.

What clinical trials is Enpatoran in?

Enpatoran has two clinical trials. NCT06589713 is a completed Phase 1 study on the effect of renal impairment on enpatoran pharmacokinetics in Germany. NCT07332481 is a recruiting Phase 3 study in the United States, Japan, and Switzerland for participants with cutaneous lupus manifestations with or without systemic disease.

Is Enpatoran FDA approved?

Enpatoran is not FDA approved. It is an investigational drug in clinical development. The FDA has granted it Breakthrough Therapy designation, which is intended to expedite development and review for serious conditions. The drug is currently being evaluated in clinical trials.