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In some countries, this medicine may only be approved for veterinary use.

In the US, Liothyronine (liothyronine systemic) is a member of the drug class thyroid drugs and is used to treat Hypothyroidism - After Thyroid Removal, Myxedema, Myxedema Coma, Thyroid Suppression Test, TSH Suppression and Underactive Thyroid.

US matches:

UK matches:



CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Thyroid hormone

Hormone replacement therapy (HRT)

Chemical Name

L-Tyrosine, O-(4-hydroxy-3-iodophenyl)-3,5-diiodo-

Foreign Names

Generic Names

  • Liothyronine (OS: DCF, BAN)
  • Liotironina (OS: DCIT)
  • T₃ (IS)
  • Triiodothyronine (IS)
  • Liothyronine Sodium (OS: BANM, JAN)
  • Sodium L-triiodothyronine (IS)
  • Liothyronine sodique (PH: Ph. Eur. 8)
  • Liothyronine Sodium (PH: BP 2016, JP XVI, USP 38)
  • Liothyronine sodium (PH: Ph. Eur. 8)
  • Liothyronin-Natrium (PH: Ph. Eur. 8)
  • Liothyroninum natricum (PH: Ph. Eur. 8, Ph. Int. 2)

Brand Names


BANBritish Approved Name
BANMBritish Approved Name (Modified)
DCFDénomination Commune Française
DCITDenominazione Comune Italiana
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)

Click for further information on drug naming conventions and International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.