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I-131-1095

Phase 2

Metastatic Prostate Cancer | Small molecule | Oncology |Lantheus Holdings, Inc.|Last Updated: Oct 14, 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
RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment120
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03939689I-131-1095 Radioligand Plus Enzalutamide vs Enzalutamide for mCRPC That Progressed During Abiraterone (ARROW).PHASE2 COMPLETED 120May 30, 2019Sep 24, 2024Oct 14, 202527 United States, Canada
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Study Endpoints
Primary Endpoints
PSA Response Rate
Up to 53 weeks

The percentage of participants with a PSA response according to PCWG3 criteria. PCWG3 defines PSA response as the first occurrence of a 50 percent or more decline in PSA from baseline, confirmed by a second measurement at least 3 weeks later.

Secondary Endpoints
Objective Response Rate (ORR)
Up to 53 weeks
Radiographic Progression Free Survival (rPFS)
Up to 5 years.
Overall Survival (OS)
Up to 5 years
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
EnzalutamideACTIVE_COMPARATORParticipants received the label dosage of enzalutamide once daily for up to 53 weeks.
I-131-1095 in combination with enzalutamideEXPERIMENTALParticipants received up to 4 (8-week) cycles of I-131-1095: 100 mCi for the first dose. Subsequent dose(s) were reduced to 75 mCi for participants experiencing any of the dose-limiting toxicities. The third and fourth therapeutic doses could be reduced to 75 mCi on the basis of dosimetry assessment after administration of 10 mCi of I-131-1095 prior to the third dosing cycle. Participants also received the label dosage of enzalutamide once daily for up to 53 weeks.
Interventions
NameTypeDescription
I-131-1095DRUGParticipants received up to 4 (8-week) cycles of I-131-1095: 100 mCi for the first dose. Subsequent dose(s) were reduced to 75 mCi for participants experiencing any dose-limiting toxicities. The third and fourth therapeutic doses could be reduced to 75 mCi on the basis of dosimetry assessment after administration of 10 mCi of I-131-1095 prior to the third dosing cycle. Participants also received the label dosage of enzalutamide once daily for up to 53 weeks.
EnzalutamideDRUGParticipants received the label dosage of enzalutamide once daily for up to 53 weeks.
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Eligibility Criteria
Age Range18 Years — N/A
SexMALE
Healthy VolunteersNo
Study Sites27

Inclusion Criteria: 1. Male ≥ 18 years of age 2. Histologically or cytologically confirmed adenocarcinoma of the prostate without neuroendocrine differentiation or small cell features at initial diagnosis 3. Castration-resistant prostate cancer, with serum testosterone ≤ 50 ng/dL at Screening 4. Ra...

Countries:United StatesCanada
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Competitive Landscape -Prostate Cancer 259 trials
CompanyTickerTrialsLead PhaseDrugs
Merck & Co., Inc.MRK7PHASE3Pembrolizumab, Enzalutamide, Ifinatamab deruxtecan, Docetaxel, Prednisone
AstraZeneca PLCAZN20PHASE3olaparib, abiraterone, Saruparib, Abiraterone, Darolutamide
Pfizer Inc.PFE12PHASE3Talazoparib with enzalutamide, PF-06821497, Docetaxel, Enzalutamide, Leuprolide Open Label
Johnson & JohnsonJNJ21PHASE3Apalutamide, Androgen Deprivation Therapy, Niraparib, Abiraterone, Prednisone
Eli Lilly and CompanyLLY9PHASE3Abemaciclib, Abiraterone, Prednisone or Prednisolone, -PNT2002, Enzalutamide
Amgen Inc.AMGN7PHASE3Xaluritamig, Abiraterone, Enzalutamide, Cabazitaxel, Docetaxel
Novartis AG Sponsored ADRNVS28PHASE3177Lu-PSMA-617, 68Ga-PSMA-11, ARDT, ADT, AAA617
Exelixis, Inc.EXEL4PHASE3Cabozantinib, Atezolizumab, Abiraterone, Enzalutamide, Prednisone
Candel Therapeutics, Inc.CADL3PHASE3Aglatimagene besadenovec + valacyclovir, aglatimagene besadenovec, valacyclovir, aglatimagene besadenovec + valacyclovir
Bristol-Myers Squibb CompanyBMY2PHASE3BMS-986365, Enzalutamide, Abiraterone, Docetaxel, Predinsone/Prednisolone
BioNTech SE Sponsored ADRBNTX1PHASE3BNT324, Docetaxel, Prednisone/prednisolone
Telix Pharmaceuticals Limited Sponsored ADRTLX3PHASE368Ga-PSMA-11, 177Lu-TLX591, Enzalutamide, Abiraterone, Docetaxel
Sanofi SA Sponsored ADRSNY2PHASE3abiraterone, Docetaxel, Cabazitaxel
Regeneron Pharmaceuticals, Inc.REGN4PHASE2REGN2810, Degarelix, Leuprolide, Docetaxel, BPX-601
Veracyte, Inc.VCYT2PHASE2Darolutamide, Zoladex, Zoladex LA, Decapeptyl sustained release, Depo-Eligard
Kyntra Bio, Inc.KYNB2PHASE2FG-3246, FOR46, Enzalutamide, Pegfilgrastim
Lantheus Holdings IncLNTH3PHASE3Undisclosed
IDEAYA Biosciences, Inc.IDYA3PHASE1IDE-161, Pembrolizumab, IDE034, IDE574, Fulvestrant
Xencor, Inc.XNCR1PHASE2vudalimab
GSK plc Sponsored ADRGSK2PHASE1GSK5471713, GSK5458514
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