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envudeucitinib

Phase 3

Plaque Psoriasis | Small molecule | Dermatology |Alumis Inc.|Last Updated: Aug 10, 2026

Target and mechanism

Molecular targetTYK2
Target class-Tinib (Kinase)
ModalitySmall molecule

Also known as Open-Label Envudeucitinib

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials4
Total Enrollment3,619

FDA Designations

No designations recorded

Clinical trial landscape

envudeucitinib · 6 trials · 7 indications

Phase 3 3Phase 2 2Phase 1 1
NCT06846541Long-term Safety and Efficacy of ESK-001 in Moderate to Severe Plaque PsoriasisPlaque Psoriasis
ACTIVE NOT_RECRUITING1,680 Analytics
NCT06588738A Study in Patients With Moderate to Severe Plaque Psoriasis to Evaluate the Efficacy and Safety of ESK-001Plaque Psoriasis
COMPLETED862 Analytics
NCT06586112A Study to Evaluate the Efficacy and Safety of ESK-001 in Patients With Moderate to Severe Plaque PsoriasisPlaque Psoriasis
COMPLETED912 Analytics
PHASE3ACTIVE NOT_RECRUITING
Long-term Safety and Efficacy of ESK-001 in Moderate to Severe Plaque Psoriasis
Plaque PsoriasisUnlock trial analytics
PHASE3COMPLETED
A Study in Patients With Moderate to Severe Plaque Psoriasis to Evaluate the Efficacy and Safety of ESK-001
Plaque PsoriasisUnlock trial analytics
PHASE3COMPLETED
A Study to Evaluate the Efficacy and Safety of ESK-001 in Patients With Moderate to Severe Plaque Psoriasis
Plaque PsoriasisUnlock trial analytics

Study Endpoints

Primary Endpoints

To assess the long-term safety and tolerability of ESK-001 throughout the duration of the study
Approximately 4 years

Incidence and severity of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs)

To determine whether ESK-001 reduces the severity of psoriasis by 75% (using the PASI) or by at least 2 points (using sPGA score) compared to placebo
16 weeks

Proportion of patients achieving ≥75% reduction in PASI score. Proportion of patients achieving a score of 0 or 1 on sPGA.

To compare the effect on disease activity measured by the proportion of patients achieving British Isles Lupus Assessment Group (BILAG)-based Composite Lupus Assessment (BICLA) response at Week 48 between doses of ESK-001 and placebo
Week 48
To assess the safety and tolerability of long-term ESK-001 treatment
Approximately 3 years

Incidence of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs)

Maximum observed plasma concentration (Cmax)
48 hours
Area under the plasma concentration-time curve from time zero to the time of the last quantifiable concentration [AUC(0-T)]
48 hours
Area under the plasma concentration-time curve from time zero extrapolated to infinite time [AUC(INF)]
48 hours

Secondary Endpoints

To assess the long-term efficacy of ESK-001 using the Psoriasis Area and Severity Index (PASI-75)
24, 48, 72, and 96 weeks
To assess the long-term efficacy of ESK-001 using the Psoriasis Area and Severity Index (PASI-90)
24, 48, 72, and 96 weeks
To assess the long-term efficacy of ESK-001 using the Psoriasis Area and Severity Index (PASI-100)
24, 48, 72, and 96 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Open-Label ESK-001EXPERIMENTALOpen-Label ESK-001 administered as an oral tablet
Blinded ESK-001EXPERIMENTALBlinded ESK-001 administered as an oral tablet
PlaceboPLACEBO_COMPARATORMatching placebo administered as an oral tablet
ESK-001EXPERIMENTALESK-001 administered as an oral tablet
ApremilastACTIVE_COMPARATORApremilast administered as an oral capsule
ESK-001 Dose Level 1EXPERIMENTALESK-001 administered as an oral tablet
ESK-001 Dose Level 2EXPERIMENTALESK-001 administered as an oral tablet
ESK-001 Dose Level 3EXPERIMENTALESK-001 administered as an oral tablet
envudeucitinib Dose Level 1EXPERIMENTALenvudeucitinib administered as an oral tablet
envudeucitinib Dose Level 2EXPERIMENTALenvudeucitinib administered as an oral tablet
Healthy VolunteerEXPERIMENTALUp to 24 healthy volunteer participants will receive a single dose of ESK-001
Mild Hepatic ImpairmentEXPERIMENTAL8 participants with mild hepatic impairment will receive a single dose of ESK-001
Moderate Hepatic ImpairmentEXPERIMENTAL8 participants with moderate hepatic impairment will receive a single dose of ESK-001
Severe Hepatic ImpairmentEXPERIMENTAL8 participants with severe hepatic impairment will receive a single dose of ESK-001

Interventions

NameTypeDescription
Open-Label EnvudeucitinibDRUGOpen-Label ESK-001
Blinded EnvudeucitinibDRUGBlinded ESK-001 during Randomized Treatment Withdrawal Period
PlaceboDRUGPlacebo during Randomized Treatment Withdrawal Period
EnvudeucitinibDRUGESK-001
ApremilastDRUGApremilast
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites268

Inclusion Criteria: 1. Males or females, age ≥18 years 2. Completed either of the two previous (parent) studies of ESK-001 (ESK-001-016 or ESK-001-017) 3. ESK-001 safety and tolerability were acceptable in the parent study 4. Women of childbearing potential (WOCBP) and males who are sexually active...

Countries:United StatesAustraliaBulgariaCanadaCzechiaEstoniaFranceGermanyHungaryJapanLatviaPolandPortugalPuerto RicoSouth KoreaSpainAustriaIsraelArgentinaChileColombiaCroatiaDenmarkGeorgiaIndiaMexicoPeruPhilippinesRomaniaTaiwanUnited Kingdom
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Recent Changes (Last 90 Days)

MEDIUMJul 28, 2026NCT05739435primaryCompletionDate: changed
MEDIUMJul 28, 2026NCT05739435primaryCompletionDate: changed
LOWJul 21, 2026NCT05966480primaryCompletionDate: changed
LOWJun 16, 2026NCT05739435lastUpdatePostDate: changed
LOWJun 16, 2026NCT05739435lastUpdatePostDate: changed
LOWJun 16, 2026NCT05739435lastUpdatePostDate: changed
MEDIUMJun 12, 2026NCT06952634TRIAL_REMOVED: changed
MEDIUMJun 12, 2026NCT06952634TRIAL_REMOVED: changed
MEDIUMJun 12, 2026NCT06952634TRIAL_REMOVED: changed

Frequently asked questions about envudeucitinib

What is envudeucitinib used for?

Envudeucitinib is an investigational small molecule being studied for hepatic impairment, plaque psoriasis, and systemic lupus erythematosus (SLE). It is being developed by Alumis Inc. (NASDAQ: ALMS) and is currently in Phase 1 clinical development.

What does envudeucitinib target?

Envudeucitinib targets TYK2, a kinase enzyme involved in inflammatory signaling pathways. By inhibiting TYK2, the drug aims to modulate immune responses implicated in conditions like plaque psoriasis and SLE.

Who makes envudeucitinib?

Envudeucitinib is being developed by Alumis Inc., a biopharmaceutical company traded on NASDAQ under the ticker symbol ALMS. The company is conducting clinical trials to evaluate the drug's safety and efficacy.

What phase is envudeucitinib in?

Envudeucitinib is in Phase 1 clinical development. While some of its trials are in Phase 3, the drug itself is listed as Phase 1, indicating it is still in early-stage investigation and not yet approved by regulatory authorities.

What clinical trials is envudeucitinib in?

Envudeucitinib has four clinical trials. NCT06952634 is a completed Phase 1 hepatic impairment study. NCT06846541 is an active Phase 3 long-term safety trial in plaque psoriasis. NCT06588738 and NCT06586112 are completed Phase 3 efficacy trials in moderate to severe plaque psoriasis.

Is envudeucitinib the same as ESK-001?

Yes, envudeucitinib is also known as ESK-001. Clinical trial records refer to the drug as ESK-001 in study titles, such as the Phase 3 trials for plaque psoriasis and the hepatic impairment study.