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INCB057643

Phase 1

Healthy Volunteers | Small molecule | Other |Incyte Corporation|Last Updated: Apr 1, 2026

Success Probability
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Market & Valuation
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Trial Design
RandomizedCONTROLLED
Total Trials1
Total Enrollment48
FDA Designations
No designations recorded
Clinical trial landscape

INCB057643 · 2 trials · 8 indications

Phase 1 2
NCT06941077A Study to Evaluate the Relative Bioavailability of New Formulations of INCB057643 Tablets Administered Orally in Healthy ParticipantsHealthy Volunteers
COMPLETED48 Analytics
NCT04279847Safety and Tolerability Study of INCB057643 in Participants With Myelofibrosis and Other Advanced Myeloid NeoplasmsMyelofibrosis
ACTIVE NOT_RECRUITING140 Analytics
PHASE1COMPLETED
A Study to Evaluate the Relative Bioavailability of New Formulations of INCB057643 Tablets Administered Orally in Healthy Participants
Healthy VolunteersUnlock trial analytics
PHASE1ACTIVE NOT_RECRUITING
Safety and Tolerability Study of INCB057643 in Participants With Myelofibrosis and Other Advanced Myeloid Neoplasms
MyelofibrosisUnlock trial analytics
Study Endpoints
Primary Endpoints
Pharmacokinetics Parameter (PK): Cmax of INCB057643
Up to Day 10

Defined as maximum observed plasma concentration of INCB057643.

Pharmacokinetics Parameter: AUC(0-last) of INCB057643
Up to Day 10

Defined as area under the single-dose serum concentration-time curve from time = 0 to the last measurable concentration at time of INCB057643.

Pharmacokinetics Parameter: AUC 0-∞ of INCB057643
Up to Day 10

Defined as the area under the single-dose serum concentration-time curve extrapolated to time of infinity of INCB057643.

Number of treatment-emergent adverse events
Up to approximately 9 months

Defined as adverse events reported for the first time or worsening of a pre-existing event after first dose of study drug monotherapy and in combination with ruxolitinib.

Secondary Endpoints
Number of participants with Treatment-emergent Adverse Events (TEAEs)
Up to Day 26
Pharmacokinetics Parameter: Tmax of INCB057643
Up to Day 10
Pharmacokinetics Parameter: t1/2 of INCB057643
Up to Day 10
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Cohort 1: Dose Treatment AEXPERIMENTALINCB057643 will be administered at protocol defined dose.
Cohort 2: Dose Treatment BEXPERIMENTALINCB057643 will be administered at protocol defined dose.
Cohort 3: Dose Treatment CEXPERIMENTALINCB057643 will be administered at protocol defined dose.
Cohort 4: Dose Treatment DEXPERIMENTALINCB057643 will be administered at protocol defined dose.
Cohort 4: Dose Treatment EEXPERIMENTALINCB057643 will be administered at protocol defined dose.
Part 1 : INCB057643 MonotherapyEXPERIMENTALINCB057643 dose escalation and dose expansion
Part 2 : INCB057643 Combination with RuxolitinibEXPERIMENTALCombination arm in dose escalation and dose expansion
Interventions
NameTypeDescription
INCB057643DRUGTablet
RuxolitinibDRUGRuxolitinib will be administered twice a day using the dose described for each Cohort in the protocol for Part 2.
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Eligibility Criteria
Age Range18 Years to 55 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Ability to comprehend and willingness to sign a written ICF for the study. * Aged 18 to 55 years, inclusive, at the time of signing the ICF. * BMI within the range of 18.0 to 30.0 kg/m2 inclusive. Note: Up to 25% of the participants in each cohort may be enrolled with a BMI \>...

Countries:United StatesCanadaChinaFinlandItalyJapanSpainUnited Kingdom
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT04279847primaryCompletionDate: changed
LOWMay 24, 2026NCT04279847studyFirstPostDate: changed