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Ra223

Phase 2

Metastatic Hormone-Sensitive Prostate Cance | Small molecule | Oncology |Bayer AG|Trials Updated: Jul 21, 2026

Ra223 development status

Highest phase Phase 2
Registered trials 1 across 1 sponsor since Jul 2026

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment50

FDA Designations

No designations recorded

Ra223 clinical trials

Ra223 · 1 trial · 1 indication

Phase 2 1
NCT07717099Radium-223 for High-Volume Metastatic Hormone Sensitive Prostate CancerMetastatic Hormone-Sensitive Prostate Cance
NOT YET_RECRUITING50 Analytics
PHASE2NOT YET_RECRUITING
Radium-223 for High-Volume Metastatic Hormone Sensitive Prostate Cancer
Metastatic Hormone-Sensitive Prostate CanceUnlock trial analytics

Study Endpoints

Primary Endpoints

Treatment compliance
Throughout the study treatment period, approximately 6 months

Measured as the total number of cycles administered to each patient. Patients will be categorized in two groups, complete treatment compliance (complete ≥5 cycles of Ra223) and incomplete treatment compliance (complete \<5 cycles of Ra223). The proportion of patients in each category and their 95% confidence interval (CI) calculated by Clopper-Pearson will be given.

Secondary Endpoints

Prostate-specific antigen (PSA) response rates
Throughout the study period, approximately 18 months
Total alkaline phosphatase response rates
Throughout the study period, approximately 18 months
Radiographic progression-free survival (rPFS)
Throughout the study period, approximately 18 months
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
QUANTUM interventionEXPERIMENTALSix intravenous administrations of Radium-223 chloride, in a dose of 55 kBq/kg body weight standard dose with a treatment interval between administrations of 4 weeks. Treatment with Ra223 could be prematurely discontinued in case of progression, unacceptable toxicity, withdrawal or death. Patients received backgrount therapy with ADT and darolutamide

Interventions

NameTypeDescription
Ra223DRUGSix intravenous administrations of Radium-223 chloride, in a dose of 55 kBq/kg body weight standard dose with a treatment interval between administrations of 4 weeks. Treatment with Ra223 could be prematurely discontinued in case of progression, unacceptable toxicity, withdrawal or death.
Darolutamide Oral TabletDRUGDarolutamide at 600 mg twice daily. Darolutamide administration will continue until progression, unacceptable toxicity, withdrawal or death, whichever comes first.
Androgen Deprivation Therapy (ADT)OTHERStandard of care ADT (surgical or drug). Administration will continue until progression, unacceptable toxicity, withdrawal or death, whichever comes first.
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Eligibility Criteria

Age Range18 Years to N/A
SexMALE
Healthy VolunteersNo
Study Sites12

INCLUSION CRITERIA Subjects must fulfill all of the following inclusion criteria to be eligible for enrollment to the study: 1. Patients must be fully informed about the study and sign the informed consent form (ICF) before any study specific assessment. 2. Patients ≥18 years old. 3. ECOG performa...

Countries:Spain
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Frequently asked questions about Ra223

What is Ra223 used for?

Ra223 is being studied for metastatic hormone-sensitive prostate cancer, a form of prostate cancer that has spread to other parts of the body but still responds to hormone therapy. The research focuses on patients with high-volume disease. It is an investigational therapy and has not been approved for this use.

Who is developing Ra223?

Ra223 is being developed by Bayer AG, which trades under the ticker BAYRY. Bayer is running the clinical program evaluating the agent in prostate cancer.

What phase is Ra223 in?

Ra223 is in Phase 2 clinical development. One Phase 2 trial is registered, and it has not yet begun recruiting participants. The study is designed to enroll 50 patients.

What clinical trial is studying Ra223?

One registered trial is evaluating Ra223: NCT07717099, titled Radium-223 for High-Volume Metastatic Hormone Sensitive Prostate Cancer. It is a Phase 2 study with a planned enrollment of 50 male patients aged 18 and older, and it is being conducted in Spain.

Is Ra223 FDA approved?

Ra223 is investigational and remains in clinical development. It is being tested in a Phase 2 trial for metastatic hormone-sensitive prostate cancer and has not completed the regulatory process for that indication. No approval for this use has been granted.

How is the Ra223 trial designed?

The Phase 2 trial NCT07717099 is an uncontrolled, open-label study, meaning it does not use a placebo or comparator group and is not blinded. It plans to enroll 50 male participants aged 18 years or older with high-volume metastatic hormone-sensitive prostate cancer in Spain.