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pembrolizumab + epacadostat

Phase 3

Melanoma | Small molecule | Oncology |Incyte Corporation|Last Updated: Aug 24, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment706
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT02752074A Phase 3 Study of Pembrolizumab + Epacadostat or Placebo in Subjects With Unresectable or Metastatic Melanoma (Keynote-252 / ECHO-301)PHASE3 COMPLETED 706Jun 21, 2016Aug 16, 2019Aug 24, 2025129 United States, Australia +21
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Study Endpoints
Primary Endpoints
Progression-free Survival
Assessed every 9 weeks for duration of study participation which is estimated to be 24 months

Progression-free survival, defined as the time from date of randomization until the earliest date of disease progression, as determined by independent central review of objective radiographic disease assessments per RECIST 1.1, or death from any cause, whichever comes first.

Overall Survival (OS) Rate at 6 Months
Assessed every 9 weeks of study participation which is estimated to be 24 months. The OS rate at Month 6 was calculated.

Defined as time from date of randomization to date of death due to any cause. OS was calculated using product-limit (Kaplan-Meier) method for censored data.

Secondary Endpoints
Objective Response Rate (ORR)
Assessed every 9 weeks for duration of study participation which is estimated to be 24 months
Safety and Tolerability, as Assessed by Percentage of Participants With Adverse Events
Through up to 90 days after end of treatment, up to 27 months
Duration of Response (DOR)
Assessed every 9 weeks for duration of study participation which is estimated to be 24 months
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Pembrolizumab + EpacadostatEXPERIMENTALPembrolizumab + Epacadostat
Pembrolizumab + PlaceboACTIVE_COMPARATORPembrolizumab + Placebo
Interventions
NameTypeDescription
pembrolizumab + epacadostatDRUG* Pembrolizumab will be administered intravenously every 3 weeks starting at Day 1 (Week 1) * Epacadostat will be administered orally daily starting at Day 1 (Week 1)
pembrolizumab + placeboDRUG* Pembrolizumab will be administered intravenously every 3 weeks starting at Day 1 (Week 1) * Placebo will be administered orally daily starting at Day 1 (Week 1)
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites129

Inclusion Criteria: * Have histologically or cytologically confirmed melanoma * Have unresectable Stage III or Stage IV melanoma, as per AJCC staging system not amenable to local therapy * A minimum of 1 measurable lesion by CT or MRI * Provide a baseline tumor biopsy * Eastern Cooperative Oncology...

Countries:United StatesAustraliaBelgiumCanadaChileDenmarkFranceGermanyIrelandIsraelItalyJapanMexicoNetherlandsNew ZealandPolandRussiaSouth AfricaSouth KoreaSpainSwedenSwitzerlandUnited Kingdom
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Competitive Landscape -Melanoma 127 trials
CompanyTickerTrialsLead PhaseDrugs
Merck & Co., Inc.MRK6PHASE3Intismeran autogene, Pembrolizumab, pembrolizumab, Pembrolizumab Berahyaluronidase alfa
Bristol-Myers Squibb CompanyBMY7PHASE3Nivolumab, Nivolumab + Relatlimab, rHuPH20, Relatlimab, relatlimab+nivolumab
Regeneron Pharmaceuticals, Inc.REGN8PHASE3Fianlimab, Cemiplimab, Pembrolizumab, fianlimab, cemiplimab
Pfizer Inc.PFE4PHASE3Encorafenib, Binimetinib, Pembrolizumab, PF-08046049, PF-07799933
IDEAYA Biosciences, Inc.IDYA4PHASE3Darovasertib, IDE196, Crizotinib, Pembrolizumab, Ipilimumab
Iovance Biotherapeutics IncIOVA6PHASE3Lifileucel plus Pembrolizumab, Pembrolizumab with Optional Crossover Period, Lifileucel, LN-145/LN-144, Cyclophosphamide
Replimune Group, Inc.REPL5PHASE3Vusolimogene Oderparepvec, Nivolumab, Pembrolizumab, Single-agent chemotherapy, RP1
Amgen Inc.AMGN1PHASE3ABP 206, Nivolumab
Immunocore Holdings Plc Shs Sponsored American Depositary Shares Repr 1 ShIMCR3PHASE3Tebentafusp, Brenetafusp, Nivolumab
Immatics N.V.IMTX2PHASE3IMA203, nivolumab plus relatlimab, lifileucel, pembrolizumab, ipilimumab
Aura Biosciences IncAURA4PHASE3Bel-sar
Novartis AG Sponsored ADRNVS6PHASE2LXH254, LTT462, Trametinib, Ribociclib, DYP688
IO Biotech, Inc.IOBT2PHASE3IO102-IO103, Pembrolizumab, Pembrolizumab KEYTRUDA
Erasca, Inc.ERAS1PHASE3Naporafenib, Dacarbazine, Temozolomide, Trametinib
AstraZeneca PLCAZN3PHASE2Ceralasertib, Durvalumab, AZD6750, rilvegostomig, Trastuzumab deruxtecan
Eikon Therapeutics, Inc.EIKN2PHASE2EIK1001, Pembrolizumab, Association atezolizumab + BDB001 + RT
Moderna, Inc.MRNA1PHASE2mRNA-4157, Pembrolizumab
Genmab A/S Sponsored ADRGMAB2PHASE2Acasunlimab, Pembrolizumab, GEN1042, Cisplatin, Carboplatin
Agenus Inc.AGEN1PHASE2Botensilimab, Balstilimab
ImmunityBio IncIBRX1PHASE2N-803 + Pembrolizumab
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