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EP547

Phase 2

Pruritus | Small molecule | Gastrointestinal |Incyte Corporation|Last Updated: Aug 8, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment151

FDA Designations

No designations recorded

Clinical trial landscape

EP547 · 2 trials · 3 indications

Phase 2 1Phase 1 1
NCT05525520Study to Evaluate EP547 in Subjects With Cholestatic Pruritus Due to Primary Biliary Cholangitis or Primary Sclerosing CholangitisPruritus
COMPLETED62 Analytics
PHASE2COMPLETED
Study to Evaluate EP547 in Subjects With Cholestatic Pruritus Due to Primary Biliary Cholangitis or Primary Sclerosing Cholangitis
PruritusUnlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in the Worst Itch Numeric Rating Scale (WI-NRS) Score up to Week 6
Baseline; up to Week 6

Participants were asked to rate the severity of their worst level of itching in the past 24 hours using the daily WI-NRS, an 11-point scale ranging from 0 (no itching) to 10 (worst itching imaginable). Itching severity scores collected via the WI-NRS have been categorized in the as mild (\<4), moderate (≥4 to \<7), or severe (≥7). The average WI-NRS score using the daily values from the week before the first dose of study drug (including the WI-NRS score captured on Study Day 1 of dosing) served as the Baseline score. A weekly score was determined based on the average of all available daily scores of the week. Change from Baseline was calculated as the post-Baseline score minus the Baseline score.

Incidence of Adverse Events
Measured from Day 1 to End of Study or Early Termination (up to 3 weeks)

To assess safety and tolerability of EP547 following single and multiple oral administration

Secondary Endpoints

Change From Baseline in the 5-D Itch Scale Total Score at Week 6
Baseline; Week 6
Percentage of Participants With Improvement in Pruritus as Defined by Patient Global Impression of Change (PGI-C) at Week 6
Baseline; Week 6
Percentage of Participants With Improvement in Pruritus Severity From Baseline as Defined by Change in Patient Global Impress of Severity (PGI-S) at Week 6
Baseline; Week 6
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
EP547 100 mgEXPERIMENTAL -
PlaceboPLACEBO_COMPARATOR -
EP547 Single DoseEXPERIMENTALSingle doses of EP547
EP547 Multiple DosesEXPERIMENTALMultiple doses of EP547
Placebo Single DosePLACEBO_COMPARATORSingle doses of placebo
Placebo Multiple DosesPLACEBO_COMPARATORMultiple doses of placebo

Interventions

NameTypeDescription
EP547DRUGOnce daily
PlaceboDRUGOnce daily
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites52

Inclusion Criteria: * Age 18 to 80 years * Documented primary biliary cholangitis (PBC) or primary sclerosing cholangitis (PSC) * Presence of consistent moderate to severe pruritus * Use of anti-pruritic and anti-cholestatic (including UDCA and obeticholic acid) medication allowed if meeting additi...

Countries:United StatesBelgiumCanadaFranceIsraelNetherlandsSpainUnited KingdomAustraliaNew Zealand
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Frequently asked questions about EP547

What is EP547 used for?

EP547 is an investigational small molecule being developed for pruritus, or itching. It is being studied in cholestatic pruritus due to primary biliary cholangitis or primary sclerosing cholangitis, as well as in uremic pruritus associated with kidney failure. It is not yet approved and remains in clinical development.

Who makes EP547?

EP547 is being developed by Incyte Corporation, a biopharmaceutical company traded on the NASDAQ under the ticker INCY. Incyte is conducting clinical trials to evaluate the safety, tolerability, and efficacy of EP547 in patients with pruritus.

What phase is EP547 in?

EP547 is in Phase 2 clinical development. It has completed a Phase 1 trial in healthy subjects and subjects with cholestatic or uremic pruritus, and a Phase 2 trial in subjects with cholestatic pruritus due to primary biliary cholangitis or primary sclerosing cholangitis. It is not FDA approved.

What clinical trials is EP547 in?

EP547 has been studied in two completed clinical trials. NCT04510090 was a Phase 1 trial in healthy subjects and subjects with cholestatic or uremic pruritus. NCT05525520 was a Phase 2 trial in subjects with cholestatic pruritus due to primary biliary cholangitis or primary sclerosing cholangitis.

How does EP547 work?

EP547 is a small molecule, but its specific molecular target has not been disclosed. It is being studied for its effects on pruritus in conditions such as cholestatic pruritus and uremic pruritus, with the goal of reducing itch in these patient populations.