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INR731

Phase 1

Metastatic Castration-resistant Prostate Cancer (mCRPC) | Small molecule | Oncology |Novartis AG|Last Updated: Jul 14, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment208

FDA Designations

No designations recorded

Clinical trial landscape

INR731 · 1 trial · 1 indication

Phase 1 1
NCT07570979A Study to Investigate the Safety and Tolerability of Oral INR731 Single Agent or in Combination With Androgen Receptor Pathway Inhibitor (ARPI) in Patients With Metastatic Prostate CancerMetastatic Castration-resistant Prostate Cancer (mCRPC)
RECRUITING208 Analytics
PHASE1RECRUITING
A Study to Investigate the Safety and Tolerability of Oral INR731 Single Agent or in Combination With Androgen Receptor Pathway Inhibitor (ARPI) in Patients With Metastatic Prostate Cancer
Metastatic Castration-resistant Prostate Cancer (mCRPC)Unlock trial analytics

Study Endpoints

Primary Endpoints

Incidence and severity of dose-limiting toxicities (DLTs)
28 days

A DLT is defined as an adverse event or abnormal laboratory value of Common Terminology Criteria for Adverse Events (CTCAE) grade ≥ 3 that occurs within the first 28 days and not clearly and incontrovertibly assessed as due to disease progression, intercurrent illness, concomitant medication, or extraneous causes with the exceptions defined in the study protocol. Other clinically significant toxicities may be considered to be DLTs, even if not CTCAE grade 3 or higher.

Incidence and severity of Adverse Events (AEs) and Serious Adverse Events (SAEs)
Up to approximately 24 months

Incidence and severity of AEs and SAEs, including changes in laboratory values, vital signs and electrocardiograms (ECGs) qualifying and reported as AEs.

Frequency of dose interruptions and reductions
Up to approximately 24 months

Number of participants with dose interruptions and/or reductions to assess the tolerability.

Dose intensity
Up to approximately 24 months

Dose intensity defined as the ratio of actual cumulative dose received and actual duration of exposure.

Secondary Endpoints

Overall Response Rate (ORR)
Up to approximately 24 months
Disease Control Rate (DCR)
Up to approximately 24 months
Radiological Progression Free Survival (rPFS)
Up to approximately 24 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
INR731 single agent (Arm A)EXPERIMENTALThe dose escalation part with single agent INR731 may be followed by a dose expansion part.
INR731 in combination with enzalutamide (Arm B)EXPERIMENTALThe dose escalation part with INR731 in combination with enzalutamide may be followed by a dose expansion part.
INR731 in combination with abiraterone (Arm C)EXPERIMENTALDose escalation of INR731 in combination with abiraterone.

Interventions

NameTypeDescription
INR731DRUGOral administration
EnzalutamideDRUGOral administration
AbirateroneDRUGOral administration
Androgen deprivation therapy (ADT)DRUGBackground therapy. Patients will continue receiving ADT throughout this clinical study as part of the standard of care.
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Eligibility Criteria

Age Range18 Years to N/A
SexMALE
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: * An Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) ≤2. * Participants must have histological and/or cytological confirmation of adenocarcinoma of the prostate. Participants with mixed histology (neuroendocrine) are eligible as long as the non-adenocarcinoma f...

Countries:United StatesAustraliaJapan
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Recent Changes (Last 90 Days)

LOWJul 14, 2026NCT07570979lastUpdatePostDate: changed
LOWJul 14, 2026NCT07570979lastUpdatePostDate: changed

Frequently asked questions about INR731

What is INR731 used for?

INR731 is an investigational small molecule being developed for metastatic castration-resistant prostate cancer (mCRPC). It is currently in Phase 1 clinical development and has not been approved by regulatory authorities. The drug is being studied as a single agent and in combination with an androgen receptor pathway inhibitor.

Who is developing INR731?

INR731 is being developed by Novartis AG (NVS), a global pharmaceutical company. The drug is currently in Phase 1 clinical trials for metastatic castration-resistant prostate cancer. Novartis is conducting the clinical development program to evaluate the safety and tolerability of this investigational therapy.

What phase is INR731 in?

INR731 is in Phase 1 clinical development. It is an investigational drug being studied for metastatic castration-resistant prostate cancer (mCRPC). The drug has not been approved by the FDA or other regulatory agencies and remains in early-stage clinical testing to evaluate its safety and tolerability.

What clinical trials is INR731 in?

INR731 is being studied in a Phase 1 clinical trial (NCT07570979) that is currently recruiting participants. The trial is investigating oral INR731 as a single agent or in combination with an androgen receptor pathway inhibitor in patients with metastatic prostate cancer. The study is enrolling approximately 208 male participants aged 18 years and older.

How is INR731 administered?

INR731 is administered orally. The Phase 1 clinical trial NCT07570979 is investigating oral INR731 as a single agent or in combination with an androgen receptor pathway inhibitor in patients with metastatic prostate cancer. The study is being conducted in the United States, Australia, and Japan.