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PF-06821497

Phase 3

Metastatic Castrate Resistant Prostate Cancer (mCRPC) | Small molecule | Oncology |Pfizer, Inc.|Last Updated: May 18, 2026

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
RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment660
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06551324A Study to Learn About the Investigational Medicine Called PF-06821497 (Mevrometostat) in Men With mCRPC Who Were Previously Treated With Abiraterone Acetate for Prostate Cancer (MEVPRO-1).PHASE3 ACTIVE NOT_RECRUITING 600Oct 21, 2024Oct 29, 2028May 5, 2026230 United States, Argentina +21
NCT07592910A Study of Mevrometostat With Enzalutamide in People With Prostate Cancer Who Have Previously Received Androgen Receptor Pathway Inhibitor TherapyPHASE2 NOT YET_RECRUITING 60Aug 1, 2026Aug 1, 2029May 18, 2026 -
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Study Endpoints
Primary Endpoints
Radiographic Progression Free Survival (rPFS) assessed by blinded independent central review (BICR) per RECIST v1.1 and Prostate Cancer Clinical Trials Working Group 3 (PCWG3)
Randomization up to approximately 2 years.

rPFS is defined as the time from the date of randomization to first objective evidence of radiographic progression as assessed in soft tissue per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 or in bone per Prostate Cancer Clinical Trials Working Group 3 (PCWG3) guidelines by BICR, or death, whichever occurs first.

Radiographic progression free survival (rPFS)
From treatment initiation until documented disease progression, death, lost to follow-up, withdrawal, administrative censoring at the time of final analysis, whichever comes first, assessed up to 24 months.

rPFS by RECIST v1.1 and PCWG3 defined as time from start of study treatment to the earlier of first documentation of objective progressive disease by RECIST v1.1 or PCWG3 or death due to any cause.

Secondary Endpoints
Overall survival (OS)
Randomization up to approximately 4.5 years.
Objective Response (ORR)
Randomization up to approximately 2 years.
Duration of Response (DoR) in measurable soft tissue disease
Randomization up to approximately 2 years.
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Arm AEXPERIMENTALInvestigational Arm A: PF-06821497 875 mg twice daily (BID) + enzalutamide 160 mg every day (QD)
Arm BACTIVE_COMPARATORComparator Arm B: Physician's choice of enzalutamide 160 mg QD or docetaxel 75 mg/m2 intravenous (IV) every 21 days
Mevrometostat + EnzalutamideEXPERIMENTALMevrometostat 875 mg orally twice daily (BID) with food in combination with enzalutamide 160 mg orally once daily. Treatment continues until confirmed radiographic disease progression, unacceptable toxicity, or other protocol-defined discontinuation criteria.
Interventions
NameTypeDescription
PF-06821497DRUG875 mg BID (2 times a day)
DocetaxelDRUG75 mg/m2 IV (every 21 days)
EnzalutamideDRUG160 mg QD
MevrometostatDRUG875 mg oral tablet, taken twice daily with food
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Eligibility Criteria
Age Range18 Years — N/A
SexMALE
Healthy VolunteersNo
Study Sites230

Inclusion Criteria: * Histologically or cytologically confirmed adenocarcinoma of the prostate without small cell features. * Metastatic disease in bone documented on bone scan, or in soft tissue documented on CT/MRI scan. * Progressive disease in the setting of surgical or medical castration with ...

Countries:United StatesArgentinaAustraliaBrazilCanadaChinaCzechiaFranceGermanyGreeceHungaryItalyJapanNetherlandsPolandSlovakiaSouth AfricaSouth KoreaSpainSwedenTaiwanTurkey (Türkiye)United Kingdom
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Recent Changes (Last 90 Days)
MEDIUMMay 26, 2026NCT06551324Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWMay 24, 2026NCT06551324studyFirstPostDate: changed
LOWMay 24, 2026NCT07592910studyFirstPostDate: changed
LOWMay 21, 2026NCT07592910NEW_TRIAL: changed
LOWMay 21, 2026NCT07592910NEW_TRIAL: changed