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Oncology Therapeutic Radiopharmaceuticals: Dosage Optimization During Clinical Development: Draft Guidance for Industry

DraftOncology Center of Excellence08/19/2025

Description

This guidance is intended to assist sponsors in identifying an optimized dosage(s) (administered activity and schedule) for radiopharmaceutical therapies (RPTs) for oncology indications during clinical development and prior to submitting a marketing application for a new indication and usage.

Scope & Applicability

Product Classes

3
Radiopharmaceutical Therapies

Guidance focuses on dosage optimization for RPTs in oncology.

Oncology Therapeutic Radiopharmaceuticals

Subject of the guidance document

Cytotoxic chemotherapies

Contrasted with modern targeted oncology drugs

Stakeholders

2
Sponsor

Entity responsible for submitting applications under section 524B

Sponsors

Assist sponsors in the nonclinical evaluation

Regulatory Context

Attributes

5
Administered Activity

Refers to the radiation dose of the radiopharmaceutical.

Schedule

Refers to the recommended interval between administrations and number of cycles.

Dose-limiting toxicity period

DLT period of one cycle

Organ absorbed doses

estimated organ absorbed doses should be accompanied by estimated uncertainties

RPT-specific organ tolerances

better define RPT-specific organ tolerances

Identified Hazards

Hazards

1
Late radiation adverse events of special interest

rAESI monitored for at least 5 years

Related CFR Sections (2)

See Also (8)

Oncology Therapeutic Radiopharmaceuticals: Dosage Optimization During Clinical Development: Draft Guidance for Industry | Guideline Explorer | BioRegHub