Levothyroxine

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

In the US, Levothyroxine (levothyroxine systemic) is a member of the drug class thyroid drugs and is used to treat Hashimoto's disease, Hypothyroidism - After Thyroid Removal, Myxedema Coma, Thyroid Suppression Test, TSH Suppression and Underactive Thyroid.

US matches:

• Levothyroxine


• Levothyroxine Capsules


• Levothyroxine Solution


• Levothyroxine Injection


• Levothyroxine Sodium


• Levothyroxine Sodium (T4; L-thyroxine)

UK matches:

• Levothyroxine Tablets 50mcg, 100mcg (Actavis UK Ltd)
• Levothyroxine 100mcg tablets (SPC)
• Levothyroxine 25 micrograms Tablets (Wockhardt UK Ltd) (SPC)
• Levothyroxine 50mcg tablets (SPC)
• Levothyroxine 50micrograms Tablets (SPC)
• Levothyroxine Tablets BP 100 micrograms (SPC)
• Levothyroxine Tablets BP 50 micrograms (Actavis UK Ltd) (SPC)

Scheme

BAN

CAS registry number (Chemical Abstracts Service)

0000051-48-9

Chemical Formula

C15-H10-I4-N-O4

Molecular Weight

775

Therapeutic Category

Thyroid hormone

Chemical Name

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

Foreign Names

• Levothyroxinum (Latin)
• Levothyroxin (German)
• Lévothyroxine (French)

Generic Names

• Levothyroxine (OS: BAN)
• Thyroxine (OS: BAN)
• L-Thyroxine (IS)
• Thyroxinum laevogirum (IS)
• Thyroxinum (PH: Ph. Helv. VI, Editio)
• Lévothyroxine sodique (OS: DCF)
• Levothyroxine Sodium (OS: BANM)
• Levotiroxina sodica (OS: DCIT)
• Thyroxine Sodium (OS: BANM, JAN)
• Thyroxin-Natrium (IS)
• Thyroxinum natricum (IS)
• Lévothyroxine sodique (PH: Ph. Eur. 6)
• Levothyroxine Sodium (PH: BP 2010, JP XIV, Ph. Int. 4, USP 32, Ph. Eur. 6)
• Levothyroxin-Natrium (PH: Ph. Eur. 6)
• Levothyroxinum natricum (PH: Ph. Int. 4, Ph. Eur. 6)

Brand Names

• Euthycin
  Incepta, Bangladesh



• Fada Levotiroxina
  Fada, Argentina



• Lévothyrox
  Merck Lipha Santé, Tunisia



• Novothyral (Levothyroxine and Liothyronine)
  Merck, Chile



• Synthroid
  Abbott, New Zealand



• Thyro-4
  Faran, Tunisia



• Thyrox
  Renata, Bangladesh



• Tiroxmen
  Menarini, Costa Rica; Menarini, Dominican Republic; Menarini, Guatemala; Menarini, Honduras; Menarini, Nicaragua; Menarini, Panama; Menarini, El Salvador



• Bagothyrox
  Bago, Russian Federation



• Berlthyrox
  Berlin Chemie, Vietnam; Berlin-Chemie, Germany



• Combithyrex (Levothyroxine and Liothyronine)
  Sandoz, Austria



• Cynocuatro
  Grossman, Mexico



• Dermocinetic (Levothyroxine and Escin)
  Geymonat, Italy



• Dexnon
  Kern, Spain



• Diotroxin (Levothyroxine and Liothyronine)
  Aspen Pharmacare, South Africa



• Dithyron (Levothyroxine and Liothyronine)
  Uni-Pharma, Greece



• Eferox
  Hexal, Bahrain; Hexal, Poland; Lindopharm, Germany



• El-Thyro
  MJ Biopharm, Myanmar



• Elthyrone
  Abbott, Belgium; Abbott, Luxembourg



• Eltroxin
  GlaxoSmithKline, United Arab Emirates; GlaxoSmithKline, Bahrain; GlaxoSmithKline, Canada; GlaxoSmithKline, Colombia; GlaxoSmithKline, Czech Republic; GlaxoSmithKline, Denmark; GlaxoSmithKline, Guyana; GlaxoSmithKline, Hong Kong; GlaxoSmithKline, Israel; GlaxoSmithKline, India; GlaxoSmithKline, Iran; GlaxoSmithKline, Kuwait; GlaxoSmithKline, Lithuania; GlaxoSmithKline, Netherlands; GlaxoSmithKline, New Zealand; GlaxoSmithKline, Oman; GlaxoSmithKline, Philippines; GlaxoSmithKline, Poland; GlaxoSmithKline, Qatar; GlaxoSmithKline, Singapore; GlaxoSmithKline, Thailand; GlaxoSmithKline, Taiwan; GlaxoSmithKline, South Africa; Goldshield, United Kingdom; Goldshield, Ireland; Sigma-Tau, Switzerland



• Eltroxin-Thyroxin
  Goldshield, Malta



• Esaldox
  Gynopharm, Chile



• Euthyral (Levothyroxine and Liothyronine)
  Merck Serono, France



• Euthyrox
  Merck, Argentina; Merck, Austria; Merck, Belgium; Merck, Bulgaria; Merck, Bahrain; Merck, Brazil; Merck, Switzerland; Merck, Colombia; Merck, Czech Republic; Merck, Germany; Merck, Greece; Merck, Croatia (Hrvatska); Merck, Hungary; Merck, Indonesia; Merck, Iceland; Merck, Lithuania; Merck, Luxembourg; Merck, Netherlands; Merck, Norway; Merck, Oman; Merck, Philippines; Merck, Poland; Merck, Sweden; Merck, Singapore; Merck, Slovakia; Merck, Thailand; Merck, Turkey; Merck, Venezuela; Merck KGaA, China; Merck KGaA, Estonia; Merck KGaA, Latvia; Merck KGaA, Romania; Merck KGaA, Serbia; Merck Sharp & Dohme, Slovenia; Nycomed, Georgia; Nycomed, Russian Federation



• Eutirox
  Bracco, Italy; Merck, Chile; Merck, Costa Rica; Merck, Dominican Republic; Merck, Ecuador; Merck, Spain; Merck, Guatemala; Merck, Honduras; Merck, Mexico; Merck, Nicaragua; Merck, Panama; Merck, Peru; Merck, El Salvador



• Eutroid (Levothyroxine and Liothyronine)
  Pfizer, Peru



• Eutroxsig
  Sigma, Australia



• Forthyron (veterinary use)
  Albrecht, Germany; Ceva, France; CEVA Vetpharma, Sweden; Eurovet, Austria; Eurovet, Belgium; Eurovet, Netherlands; Eurovet Animal Health B.V., Luxembourg; Gräub, Switzerland; Vetcare, Finland



• Jodthyrox (Levothyroxine and Potassium Iodide)
  Merck, Austria; Merck, Germany



• L Thyroxine SERB
  SERB, France



• Letequatro
  Upsifarma, Portugal



• Letrox
  Berlin Chemie, Bosnia & Herzegowina; Berlin-Chemie, Czech Republic; Berlin-Chemie, Croatia (Hrvatska); Berlin-Chemie, Hungary; Berlin-Chemie, Poland; Berlin-Chemie, Serbia; Menarini, United Arab Emirates; Menarini, Bahrain; Menarini, Cyprus; Menarini, Egypt; Menarini, Iraq; Menarini, Jordan; Menarini, Kuwait; Menarini, Lebanon; Menarini, Libya; Menarini, Morocco; Menarini, Qatar; Menarini, Saudi Arabia; Menarini, Sudan; Menarini, Syria; Menarini, Yemen



• Letter
  Sanofi-Aventis - Produtos farmacêuticos, S.A., Portugal



• Levaxin
  Nycomed, Iceland; Nycomed, Norway; Nycomed, Sweden



• Leventa (veterinary use)
  Intervet, Germany; Intervet, France; Veterinaria, Switzerland



• Levoroxin
  Polfa Warszawa, Poland



• Levothroid
  Forest, United States; Sanofi-Aventis S.A.U., Spain



• Levothyroid
  IFET, Greece



• Lévothyrox
  Merck Serono, France



• Levothyroxin (veterinary use)
  Ceva, Netherlands



• Lévothyroxine Biogaran
  Biogaran, France



• Levothyroxine Christiaens
  Nycomed, Netherlands



• Levothyroxine Sodium
  APP, United States; Bedford, United States; Lannett, United States; Merck, United States; Mylan, United States; Sandoz, United States



• Levothyroxine
  Actavis, Indonesia; APP, Hong Kong; Goldshield, New Zealand; Pharmaceutical Partners of Canada, Canada; Wockhardt, United Kingdom



• Levothyroxine Na
  Sandoz, Japan



• Levotiron
  Abdi Ibrahim, Turkey



• Levotiroxina Fabra
  Fabra, Argentina



• Levotiroxina Northia
  Northia, Argentina



• Levotiroxina Sodica L.CH.
  Chile, Chile



• Levotiroxina Sodica Marfan
  Marfan, Peru



• Levotiroxina Sodica Perugen
  Perugen, Peru



• Levotiroxina Sodica
  Bestpharma, Chile; GlaxoSmithKline, Argentina



• Levotiroxina
  GlaxoSmithKline, Ecuador



• Levoxyl
  Jones, United States; King, United States



• L-T
  Craveri, Argentina



• L-Thyrox Hexal
  Hexal, Germany; Hexal, Estonia



• L-Thyrox Jod Hexal (Levothyroxine and Potassium Iodide)
  Hexal, Germany



• L-Thyroxin AL
  Aliud, Germany



• L-Thyroxin Aristo
  Aristo Pharma, Germany



• L-Thyroxin Berlin-Chemie
  Berlin-Chemie, Bulgaria; Berlin-Chemie, Estonia; Berlin-Chemie, Georgia; Berlin-Chemie, Lithuania; Berlin-Chemie, Latvia; Berlin-Chemie, Russian Federation



• L-Thyroxin beta
  Betapharm, Germany



• L-Thyroxin Henning
  Henning Berlin, Germany; Sanofi-Aventis, Austria; Sanofi-Aventis, Germany; Sanofi-Aventis, Hungary



• L-Thyroxin Jod Aristo (Levothyroxine and Potassium Iodide)
  Aristo Pharma, Germany



• L-Thyroxin Jod-1A Pharma (Levothyroxine and Potassium Iodide)
  1A Pharma, Germany



• L-Thyroxin
  Berlin-Chemie, Romania; Berlin-Chemie, Slovakia



• L-Thyroxin-Akri
  Akrihin, Russian Federation



• L-Thyroxin-CT
  CT Arzneimittel, Germany



• L-Thyroxine Christiaens
  Christiaens, Luxembourg; Nycomed, Luxembourg



• L-Thyroxine Sandoz
  Sandoz, Lithuania



• L-Thyroxine SERB
  SERB, France



• L-Thyroxine
  Nycomed, Belgium



• L-Thyroxine (veterinary use)
  Aesculaap, Netherlands



• L-Thyroxin-Jod beta (Levothyroxine and Potassium Iodide)
  Betapharm, Germany



• L-Thyroxin-ratiopharm
  Ratiopharm, Germany



• Medithyrox
  Intermed, Greece



• Meprobamate
  InvaGen, United States



• Novothyral
  Merck, Austria; Merck, Belgium; Merck, Luxembourg



• Novothyral (Levothyroxine and Liothyronine)
  Merck, Switzerland; Merck, Germany



• Oroxine
  GlaxoSmithKline, Bangladesh; GlaxoSmithKline, Malaysia; GlaxoSmithKline, Singapore; Sigma, Australia



• Prothyrid (Levothyroxine and Liothyronine)
  Henning Berlin, Germany; Sanofi-Aventis, Germany



• Roxin
  Cadila Gehört zu Zydus, India



• Soloxine (veterinary use)
  Arnolds, United Kingdom



• Synthroid
  Abbott, Brazil; Abbott, Canada; Abbott, Colombia; Abbott, United States



• T4
  Montpellier, Argentina; Uni-Pharma, Greece



• T4-Bago
  Bago, Chile



• Tefor
  Organon, Turkey



• Thevier
  GlaxoSmithKline, Germany



• Thyradin
  S ASKA SeiyakuAsuka, Japan



• Thyrax Duotab
  Organon, Luxembourg; Organon, Netherlands



• Thyrax
  Organon, Belgium; Organon, Ghana; Organon, Indonesia; Organon, Kenya; Organon, Luxembourg; Organon, Philippines; Organon, Portugal; Organon, Tanzania; Organon, Venezuela; Organon, Zimbabwe



• Thyrex
  Sandoz, Austria



• Thyro-4
  Faran, Romania; Faran Laboratories, Greece



• Thyrohormone
  Ni-The, Greece



• Thyrolar (Levothyroxine and Liothyronine)
  Forest, United States



• Thyronajod (Levothyroxine and Potassium Iodide)
  Henning Berlin, Germany; Sanofi-Aventis, Germany



• Thyrosin
  Techno, Bangladesh



• Thyrosit
  Sriprasit, Singapore



• Thyroxin
  Orion, Finland



• Thyroxine (veterinary use)
  Apex Laboratories, Australia



• Tiracrin
  Geymonat, Italy



• Tiroidine
  Rudefsa, Mexico



• Tirosint
  Amsa, Italy; IBSA, Switzerland



• Tiroxin
  Metlen, Colombia



• Tivoral
  Galenika, Serbia



• Unithroid
  Watson, United States

International Drug Name Search

Glossary

BAN	British Approved Name
BANM	British Approved Name (Modified)
DCF	Dénomination Commune Française
DCIT	Denominazione Comune Italiana
IS	Inofficial Synonym
JAN	Japanese Accepted Name
OS	Official Synonym
PH	Pharmacopoeia Name
SPC	Summary of Product Characteristics (UK)

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