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ESK-001

Phase 2

Plaque Psoriasis | Small molecule | Dermatology |Alumis Inc.|Last Updated: Jan 30, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment228

FDA Designations

No designations recorded

Clinical trial landscape

ESK-001 · 4 trials · 4 indications

Phase 2 1Phase 1 3
NCT05600036A Study to Evaluate the Efficacy and Safety of ESK-001 in Patients With Plaque PsoriasisPlaque Psoriasis
COMPLETED228 Analytics
PHASE2COMPLETED
A Study to Evaluate the Efficacy and Safety of ESK-001 in Patients With Plaque Psoriasis
Plaque PsoriasisUnlock trial analytics

Study Endpoints

Primary Endpoints

To Compare the Psoriasis Area and Severity Index (PASI-75) Between Doses of ESK-001 and Placebo
12 weeks

Proportion of patients with moderate to severe psoriasis achieving ≥75% reduction in PASI score

Maximum observed plasma concentration (Cmax)
48 hours
Incidence of nonserious adverse events (AE), serious adverse events (SAE), and AE leading to discontinuation
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
Change from baseline in placebo-adjusted QTcF (∆∆QTcF)
24 hours
Assess the PK parameters of ESK-001 via time of maximum plasma concentration (Tmax)
18 Days

Relative bioavailability and food effect assessment via collection and comparison of PK plasma samples between dosing arms

Assess the PK parameters of ESK-001 via maximum plasma concentration (Cmax)
18 Days

Relative bioavailability and food effect assessment via collection and comparison of PK plasma samples between dosing arms

Assess the PK parameters of ESK-001 via area under the concentration time curve (AUC)
18 Days

Relative bioavailability and food effect assessment via collection and comparison of PK plasma samples between dosing arms

Secondary Endpoints

To Assess the Safety and Tolerability of ESK-001 Dose in Moderate to Severe Psoriasis Patients
12 weeks
To Assess the Response Rate in Static Physician's Global Assessment (sPGA) Score
12 weeks
To Characterize the Pharmacokinetics (PK) of ESK-001
14 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
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
ESK-001 Dose Level 4EXPERIMENTALESK-001 administered as an oral tablet
ESK-001 Dose Level 5EXPERIMENTALESK-001 administered as an oral tablet
PlaceboPLACEBO_COMPARATORPlacebo administered as an oral tablet
Healthy VolunteerEXPERIMENTALUp to 24 healthy volunteer participants will receive a single dose of ESK-001
Mild Renal ImpairmentEXPERIMENTAL8 participants with mild renal impairment will receive a single dose of ESK-001
Moderate Renal ImpairmentEXPERIMENTAL8 participants with moderate renal impairment will receive a single dose of ESK-001
Severe Renal ImpairmentEXPERIMENTAL8 participants with severe Renal impairment will receive a single dose of ESK-001
Treatment 1: (Therapeutic dose)EXPERIMENTAL1 oral dose of ESK-001
Treatment 2: (Supratherapeutic dose)EXPERIMENTAL1 oral dose of ESK-001
Treatment 3: ESK-001-matched placeboPLACEBO_COMPARATOR -
Treatment 4: (positive control)ACTIVE_COMPARATORMoxifloxacin 400 mg tablet
ESK-001 LiquidEXPERIMENTALESK-001 administered as an oral liquid
ESK-001 Tablet FastedEXPERIMENTALESK-001 administered as an oral tablet in the fasted state
ESK-001 Tablet FedEXPERIMENTALESK-001 administered as an oral tablet in the fed state
ESK-001 and RabeprazoleEXPERIMENTALESK-001 administered as an oral tablet with rabeprazole

Interventions

NameTypeDescription
ESK-001DRUGOral tablet
PlaceboDRUGOral tablet
Moxifloxacin (400 mg)DRUGpositive control
RabeprazoleDRUGOral Tablet
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites53

Inclusion Criteria: * Total body weight \>40 kg (88 lb) * Men and woman age 18-75 * Men and Women must use highly effective methods of contraception for the entirety of the study Exclusion Criteria: * History of malignancy within the last 5 years * Positive for HIV, Hepatitis B or C * History of ...

Countries:United StatesCanadaCzechia
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Frequently asked questions about ESK-001

What is ESK-001 used for?

ESK-001 is an investigational small molecule being studied for plaque psoriasis. It has also been evaluated in healthy volunteers for pharmacokinetics, renal impairment, and cardiac safety. Clinical trials have assessed its efficacy and safety in patients with plaque psoriasis.

Who makes ESK-001?

ESK-001 is being developed by Alumis Inc., a biopharmaceutical company. Alumis is publicly traded under the ticker symbol ALMS.

What phase is ESK-001 in?

ESK-001 is in clinical development. It has completed Phase 1 trials in healthy volunteers and a Phase 2 trial in patients with plaque psoriasis. It is not yet FDA approved and remains investigational.

What clinical trials is ESK-001 in?

ESK-001 has been studied in several completed trials. NCT05330858 evaluated tablet versus liquid bioavailability in healthy participants. NCT05600036 assessed efficacy and safety in plaque psoriasis. NCT06962774 studied renal impairment, and NCT07378579 evaluated cardiac safety.

Is ESK-001 the same as other names?

ESK-001 is the primary name for this investigational drug. No alternative names have been reported in clinical trial records.