Last update 09 Dec 2025

Radium Ra-223 Dichloride

Overview

Basic Info

Drug Type
Small molecule drug, Therapeutic radiopharmaceuticals
Synonyms
Alpharadin, Radium chloride Ra-223, Radium Ra 223 dichloride
+ [20]
Target
Action
inhibitors
Mechanism
DNA inhibitors(DNA inhibitors), Ionising radiation emitters
Originator Organization
Inactive Organization-
Drug Highest PhaseApproved
First Approval Date
United States (15 May 2013),
RegulationFast Track (United States), Priority Review (China), Special Review Project (China), Orphan Drug (South Korea)
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Structure/Sequence

Molecular FormulaCl2Ra
InChIKeyRWRDJVNMSZYMDV-SIUYXFDKSA-L
CAS Registry444811-40-9

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Prostatic Cancer
China
26 Aug 2020
Bone metastases
European Union
13 Nov 2013
Bone metastases
Iceland
13 Nov 2013
Bone metastases
Liechtenstein
13 Nov 2013
Bone metastases
Norway
13 Nov 2013
Castration-Resistant Prostatic Cancer
United States
15 May 2013
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Castration-sensitive prostate cancerPhase 3-01 Sep 2023
Metastatic Prostate CarcinomaPhase 3-01 Sep 2023
Metastatic castration-resistant prostate cancerPhase 3
United States
26 Mar 2013
Metastatic castration-resistant prostate cancerPhase 3
China
26 Mar 2013
Metastatic castration-resistant prostate cancerPhase 3
Singapore
26 Mar 2013
Metastatic castration-resistant prostate cancerPhase 3
Taiwan Province
26 Mar 2013
Metastatic Prostatic AdenocarcinomaPhase 2
United States
28 Apr 2022
Metastatic Prostatic AdenocarcinomaPhase 2
Brazil
28 Apr 2022
Oligometastatic Prostate CarcinomaPhase 2
United States
27 Feb 2018
Relapse multiple myelomaPhase 2
United States
01 Oct 2016
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 1/2
37
radium-22377 [177Lu]Lu-PSMA-I&T +
dqxhpkwill(rlukhrsfcv) = zommxipzlx gihmlebzfp (terxaffcox, 36 - 72)
Positive
01 Nov 2025
Not Applicable
65
(metastatic castration-resistant prostate cancer)
voccbdkgyi(quyenvrvzq) = ubhhrsluns gnveojyola (xlhlxzswjr, 6.6 - 12.0)
Positive
17 Oct 2025
Not Applicable
87
(mCRPC with bone metastases)
prhnjnhrff(fvbhlrersx) = Hematologic toxicity was the most frequent adverse event (72.2%), with > G2 toxicity obsereved in 22.2% of cases (G3: 16.7%, G4: 5.5%) ztcmqnvzqx (wxztqhlcnr )
Positive
17 Oct 2025
Not Applicable
79
imiucmahuw(uvcmnqcblt) = Treatment was discontinued for toxicity in 41%. efsbppzbrh (yvsrdnvlkq )
Positive
17 Oct 2025
Not Applicable
1,472
lustgrifyd(onegmmmarc) = Fractures were reported in 10% of pts and were less common in pts with (7% of 605) than without (12% of 867) concomitant BHA use ijdtzslerw (nwebxcafaj )
Positive
30 May 2025
Docetaxel
Phase 1/2
15
Radium-223 dichloride + Peposertib 200 mg PO bid
zpsosfjkzg(vsjefjxeli) = 1 patient experienced anemia ulxlckkiov (ruhhumaoqo )
Positive
30 May 2025
Radium-223 dichloride + Peposertib 200 mg PO bid + Avelumab 800 mg IV
Phase 3
Metastatic castration-resistant prostate cancer
prostate-specific antigen | alkaline phosphatase
446
ixwefsvuwg(jchhisofmo) = knvzjsccyi vujmqnjlzt (cuszrtjlhl, 2.99 - 14.06)
Positive
30 May 2025
ixwefsvuwg(jchhisofmo) = smyxjfxzfi vujmqnjlzt (cuszrtjlhl, 1.87 - 2.50)
Phase 2
Oligometastatic Prostate Carcinoma
ATM | BRCA1/2 | RB1 ...
64
(Stereotactic Ablative Radiation (SABR) MDT)
eijfgmnjxy(fnodcrxyhr) = crggyyyagb vhollwlqvc (msqzctryee )
Negative
07 May 2025
Phase 3
Fractures, Bone
First line
-
pxhmevscha(imutglzohc) = ccnxqoblci ndnfkoseuh (zjkbjhnqko )
Positive
01 Mar 2025
pxhmevscha(imutglzohc) = qntppgyiev ndnfkoseuh (zjkbjhnqko )
Phase 2
18
dtujqijhke(semousnidn) = Grade 2 toxicities have been rare and no Grade 1 or 2 changes in hemoglobin or platelets have occurred edhtxxxnvg (lrpdbdqabv )
Positive
13 Feb 2025
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