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Study identifier: NCT05075577 Synced from ClinicalTrials.gov · July 29, 2026
● Terminated

EPI-7386 in Combination with Enzalutamide Compared with Enzalutamide Alone in Subjects with MCRPC

Condition: Prostate Cancer  ·  Sponsor: ESSA Pharmaceuticals

PhasePhase 1/Phase 2
Planned participants77
Who can joinMale, 18 Years to no upper limit
Healthy volunteersNo

About this study

This is a Phase 1/2 study of EPI-7386 orally administered in combination with enzalutamide in subjects with mCRPC. Phase 1 of the study will be a single-arm dose escalation study of EPI-7386 in combination with a fixed dose of enzalutamide. This portion of the study will primarily evaluate the safety and tolerability of the drug combination and establish the RP2CDs for EPI-7386 and enzalutamide when dosed in combination. In addition, blood sampling will be conducted for PK evaluation to assess the potential DDI between the two drugs. Once the RP2CD for each drug has been established, Phase 2 of the study will commence. Phase 2 is a two-arm, randomized (2:1), open-label study. Approximately 120 subjects will be randomized 2:1 to: * Group 1: EPI-7386 at the RP2CD + enzalutamide(depending on the results of the Phase 1) (n=80) * Group 2: Enzalutamide single agent (n=40) The planned dose of enzalutamide and EPI-7386 for the combination arm will be those determined in the Phase 1 of this study based on safety and exposure data. Subjects may remain on study treatment as long as they are tolerating treatment without disease progression based on RECIST v1.1 and/or PCWG3.

This description comes directly from the study's public registry record.

Talk to the study team

Contact details are listed per location below or on the registry record.

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Locations (24)

Arizona UrologyTucson, Arizona, United States
Hematology Oncology Associates of the Treasure CoastPort Saint Lucie, Florida, United States
Moffitt Cancer CenterTampa, Florida, United States
Chesapeake Urology AssociatesBaltimore, Maryland, United States
Johns Hopkins UniversityBaltimore, Maryland, United States
Washington University Siteman Cancer CenterSt Louis, Missouri, United States
Urology Cancer CenterOmaha, Nebraska, United States
Great Lakes Cancer CenterBuffalo, New York, United States
Roswell Park Comprehensive Cancer CenterBuffalo, New York, United States
Memorial Sloan Kettering Cancer CenterNew York, New York, United States
OHSU Knight Cancer InstitituePortland, Oregon, United States
Carolina Urologic Research CenterMyrtle Beach, South Carolina, United States

+ 12 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT05075577