OnCo
drugsProductPhase 3

Actinium-225 DOTATATE

An alpha-particle version of Lutathera for neuroendocrine tumours that have stopped responding to the beta version.

BMS (via RayzeBio, $4.1B acquisition 2024). ACTION-1 phase 3 in SSTR+ GEP-NETs progressing after 177Lu-SSTR therapy; also in extensive-stage SCLC with chemo-immunotherapy.

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DOTATATE (oxodotreotide) · 2D coordinates (no PubChem conformer)
PubChem
How it works, step by step · animated schematic, not to scale
Targeted alpha therapy
Mechanism, step by step
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1.Radioligand circulates and binds Somatostatin receptor 2 on tumour cells

Modality
Targeted alpha therapy
Mechanism
DOTATATE chelating 225Ac; alpha decay chain.
Brand / code
RYZ101
Dosing & schedule
Route
IV infusion
Schedule
10.5 MBq/kg every 8 weeks for 4 cycles (ACTION-1)
Monitoring
Renal function, blood counts, amino acid co-infusion

Source: clinicaltrials.gov/study/NCT05477576. Doses are for orientation; the current label governs.

Regulatory

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  1. 26 Feb 2024Filing / dealUS

    BMS completes RayzeBio acquisition ($4.1B) source

Safety

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Toxicity profile
Adverse event
Nausea
Fatigue
Lymphopenia
Renal toxicity (monitor)

Events listed without rates were not read from a primary source; see the label. Blank cells mean the figure was not sourced, not that it is zero.

Cost & access

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Cost & access
CountryReimbursement
United StatesInvestigational

List prices are manufacturer or Medicare figures where publicly disclosed; net prices after rebates are usually lower. Reimbursement changes; check the payer.

Trials

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ClinicalTrials.gov · phase 2/3
refreshed 2026-09-09
1 studies1 recruiting1 Phase 3
Search “Actinium-225 DOTATATE” on ClinicalTrials.gov →
Counts are from a name search and may include unrelated studies; up to 100 studies are summarised.

Recruiting now (live from ClinicalTrials.gov)

Recruiting trials near you · live from ClinicalTrials.gov
Actinium-225 DOTATATE
intervention: Actinium-225 DOTATATE
Open on ClinicalTrials.gov →

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Latest papers

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Literature trend1 papers in the last 12 monthsHow this is computed
Latest papers · live from Europe PMC
Open in Europe PMC

Query for this drug: (TITLE:"Actinium-225 DOTATATE" OR ABSTRACT:"Actinium-225 DOTATATE" OR TITLE:"RYZ101" OR ABSTRACT:"RYZ101") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about Actinium-225 DOTATATE, not a curated reading list.

Connected

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