Drug reference
radioactive iodine (123i)
diagnostic radiopharmaceutical · diagnostic agent
diagnostic radiopharmaceuticaldiagnostic agent
CDSCO approved
EXCRETION
—
not curated
INTERACTIONS
—
none in our sources
PREGNANCY
—
not curated
Mechanism
Primarily a short-lived γ-emitter.
Indications
diagnostic studies of thyroid function24-h radioactive iodine uptake (RAIU) test
Pharmacokinetics
Half-life
13 h
Related guidelines
Hypothyroidism in adults
ITS · Endocrinology · 2021
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Hypothyroidism in adults
ENDOCRINE_SOCIETY · Endocrinology · 2014
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RSSDI · Endocrinology · 2025
Other diagnostic radiopharmaceutical drugs
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Textbook-sourced·Sources: Goodman & Gilman 14e·Updated: 2026-05-10