Chemicals and Drugs

Triiodothyronine

A T3 thyroid hormone normally synthesized and secreted by the thyroid gland in much smaller quantities than thyroxine (T4). Most T3 is derived from peripheral monodeiodination of T4 at the 5' position of the outer ring of the iodothyronine nucleus. The hormone finally delivered and used by the tissues is mainly T3.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A T3 thyroid hormone normally synthesized and secreted by the thyroid gland in much smaller quantities than thyroxine (T4). Most T3 is derived from peripheral monodeiodination of T4 at the 5' position of the outer ring of the iodothyronine nucleus. The hormone finally delivered and used by the tissues is mainly T3.

MeSH Record

Classification

Broader headings

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MeSH Record

See Also

MeSH Record

Synonyms

6 entry terms
  • T3 Thyroid Hormone
  • Thyroid Hormone, T3
  • 3,3',5-Triiodothyronine
  • Cytomel
  • Liothyronine
  • Liothyronine Sodium

MeSH Record

Aspects Covered

30 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

History Note

LIOTHYRONINE was heading 1963-66

MeSH Hierarchy

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NLM Classification

WK 202

AMA Style

References

  1. National Library of Medicine. Triiodothyronine. Medical Subject Headings (MeSH). 2026. Unique ID D014284. http://id.nlm.nih.gov/mesh/2026/D014284
  2. Triiodothyronine. In: Wikipedia. https://en.wikipedia.org/wiki/Triiodothyronine
  3. Triiodothyronine. In: Wikidata. https://www.wikidata.org/wiki/Q327362