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:

UK matches:

Scheme

BAN

CAS registry number (Chemical Abstracts Service)

0000051-48-9

Chemical Formula

C15-H10-I4-N-O4

Molecular Weight

775

Therapeutic Categories

Hormone replacement therapy (HRT)

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

Brand Names

  • Bagothyrox
    Cimica Montpelier, Georgia
  • Eferox
    Hexal, Oman
  • Euthycin
    Incepta, Bangladesh
  • L Thiroxin Berlin-Chemie
    Berlin-Chemie, Georgia
  • Levaxin
    Nycomed, Iceland
  • Lévothyrox
    Merck Santé, Tunisia
  • Novothyral (Levothyroxine and Liothyronine)
    Merck, Chile
  • Somatoline (Levothyroxine and Escin)
    Manetti Roberts, Italy
  • Thiroyd
    Greater Pharma, Thailand
  • Thyro-4
    Faran, Tunisia
  • Thyroid-S
    Sriprasit Dispensary, Thailand
  • Tiroideibsa (Levothyroxine and Liothyronine)
    IBSA Farmaceutici Italia, Italy
  • Berlthyrox
    Berlin Chemie Menarini group, Vietnam
  • Bitiron (Levothyroxine and Liothyronine)
    Abdi Ibrahim, Turkey
  • Combithyrex (Levothyroxine and Liothyronine)
    Sandoz, Austria
  • Combithyrex forte (Levothyroxine and Liothyronine)
    Sandoz, Austria
  • Combithyrex mite (Levothyroxine and Liothyronine)
    Sandoz, Austria
  • Cynoplus (Levothyroxine and Liothyronine)
    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
    Aristo Pharma, Germany; Hexal, Bahrain
  • El-Thyro
    M.J. Biopharm, Thailand; MJ Biopharm, Myanmar
  • Elthyrone
    Abbott, Belgium; Abbott, Luxembourg
  • Eltroksin
    GlaxoSmithKline, Slovenia
  • Eltroxin/Thyroxin
    Goldshield, Malta
  • Eltroxin
    Alfred Gera, Malta; Aspen, New Zealand; GlaxoSmithKline, Bangladesh; GlaxoSmithKline, Bahrain; GlaxoSmithKline, Colombia; GlaxoSmithKline, Czech Republic; GlaxoSmithKline, Denmark; GlaxoSmithKline, Israel; GlaxoSmithKline, India; GlaxoSmithKline, Lithuania; GlaxoSmithKline, Netherlands; GlaxoSmithKline, Oman; GlaxoSmithKline, Philippines; GlaxoSmithKline, Poland; GlaxoSmithKline, Singapore; GlaxoSmithKline, Thailand; GlaxoSmithKline, Taiwan; GlaxoSmithKline, South Africa; Goldshield, Ireland; Mercury, United Kingdom; Triton Pharma, Canada
  • Eltroxin-LF
    sigma-tau, Switzerland
  • Esaldox
    Recalcine, Chile
  • Eurolev
    Renata, Philippines
  • Euthyral (Levothyroxine and Liothyronine)
    Merck Serono, France
  • Euthyrox
    Elea, Argentina; Merck, Austria; Merck, Belgium; Merck, Bulgaria; Merck, Bahrain; Merck, Brazil; Merck, Switzerland; Merck, Georgia; Merck, Greece; Merck, Croatia (Hrvatska); Merck, Hungary; Merck, Indonesia; Merck, Iceland; Merck, Lithuania; Merck, Netherlands; Merck, Norway; Merck, Philippines; Merck, Serbia; Merck, Sweden; Merck, Singapore; Merck, Slovenia; Merck, Slovakia; Merck, Thailand; Merck, Turkey; Merck, Venezuela; Merck KGaA, Latvia; Merck KGaA, Romania; Merck Pharma, Czech Republic; Merck Serono, China; Merck Serono, Germany; Merck Serono, Malaysia; Merck Serono, Oman; Merck Serono, Russian Federation; Merck Serono, South Africa
  • Euthyrox N
    Merck, Poland
  • Eutirox
    Bracco, Italy; Merck, Chile; Merck, Costa Rica; Merck, Dominican Republic; Merck, Ecuador; Merck, Guatemala; Merck, Honduras; Merck, Mexico; Merck, Nicaragua; Merck, Panama; Merck, Peru; Merck, El Salvador; Merck S.L., Spain; Merck Serono, Portugal
  • Eutroid L
    Pfizer, Peru
  • Eutroid (Levothyroxine and Liothyronine)
    Elea, Argentina; Pfizer, Peru
  • Eutroxsig
    Sigma, Australia
  • Forthyron (veterinary use)
    Albrecht, Germany; Ceva, France; CEVA Vetpharma, Sweden; Eurovet, Austria; Eurovet, Belgium; Eurovet, Netherlands; Eurovet Animal Health, Poland; Eurovet Animal Health B.V., Luxembourg; Eurovet Animal Health BV, United Kingdom; Gräub, Switzerland; Vetcare, Finland
  • Jaroxin
    Jayson, Bangladesh
  • Jodthyrox (Levothyroxine and Potassium Iodide)
    Merck, Austria; Merck, Bulgaria; Merck, Poland; Merck Pharma, Czech Republic; Merck Serono, Germany; Merck Serono, Russian Federation
  • Karet
    Armstrong, Mexico
  • L Thyroxine SERB
    SERB, France
  • Letrox
    Berlin Chemie, Bosnia & Herzegowina; Berlin-Chemie, China; Berlin-Chemie, Czech Republic; Berlin-Chemie, Croatia (Hrvatska); Berlin-Chemie, Hungary; Berlin-Chemie, Poland; Berlin-Chemie, Serbia
  • Letter
    Sanofi-Aventis, Portugal
  • Levaxin
    Nycomed, Norway; Nycomed, Sweden
  • Leventa (veterinary use)
    Intervet, Germany; Intervet, France; Intervet, United Kingdom; Intervet, Poland; Intervet, Sweden; Intervet International B.V., Luxembourg; Veterinaria, Switzerland
  • Levolet
    Hamad, Bahrain
  • Levothroid
    Forest, United States; Sanofi Aventis, Spain
  • Levothyroid
    IFET, Greece
  • Levothyrox
    Merck Sante, Vietnam
  • Lévothyrox
    Merck Serono, France
  • Levothyroxin (veterinary use)
    Ceva, Netherlands
  • Levothyroxine - ZhongLian Pharm
    Zhonglian Pharmaceutical, China
  • Lévothyroxine Biogaran
    Biogaran, France
  • Levothyroxine Christiaens
    Nycomed, Netherlands
  • Lévothyroxine Ratiopharm
    Ratiopharm, France
  • Levothyroxine Sodium APP
    APP, United States
  • Levothyroxine Sodium
    Bedford, United States; Lannett, United States; Merck, United States; Mylan, United States; Sandoz, United States
  • Levothyroxine
    Actavis, United Kingdom; Actavis, Indonesia; Actavis, Malta; APP, Hong Kong; Cherubino, Malta; Clinipharm, Malta; Forley, Malta; Goldshield, New Zealand; Mercury, United Kingdom; P & D, Malta; Pharmaceutical Partners of Canada, Canada; Wockhardt, United Kingdom
  • Levothyroxine Na
    Sandoz, Japan
  • Levothyroxinum Rup Borisov
    Rup Borisov Medical Preparation Plant, Georgia
  • Levotiron
    Abdi Ibrahim, Turkey
  • Levotiroxina Fabra
    Fabra, Argentina
  • Levotiroxina MK
    MK, Colombia
  • Levotiroxina Northia
    Northia, Argentina
  • Levotiroxina Sodica Andromaco
    Andromaco, Chile
  • Levotiroxina Sodica Colmed
    Colmed, Colombia
  • Levotiroxina Sodica L.CH.
    Chile, Chile
  • Levotiroxina Sodica
    GlaxoSmithKline, Argentina
  • Levotiroxina Sódica
    Marfan, Peru; Perugen, Peru
  • Levotyroxin Nycomed
    Nycomed, Sweden
  • Levoxyl
    Jones, United States; King Pharmaceuticals, United States
  • L-T
    Craveri, Argentina
  • L-Thyrox HEXAL
    Hexal, Germany
  • L-Thyrox Jod HEXAL (Levothyroxine and Potassium Iodide)
    Hexal, Germany
  • L-Thyroxin - 1 A Pharma
    1A Pharma, 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
  • L-Thyroxin beta
    Betapharm, Germany
  • L-Thyroxin Farmak
    Farmak, Georgia
  • L-Thyroxin Henning
    Henning Berlin, Germany; Sanofi-Aventis, Austria; Sanofi-Aventis, Germany; Sanofi-Aventis, Hungary; Winthrop, Germany
  • L-Thyroxin Jod - 1A-Pharma (Levothyroxine and Potassium Iodide)
    1A Pharma, Germany
  • L-Thyroxin
    Berlin-Chemie, Romania; Berlin-Chemie, Slovakia
  • L-Thyroxin-CT
    CT Arzneimittel, Germany
  • L-Thyroxine Sandoz
    Sandoz, Lithuania
  • L-Thyroxine
    Nycomed, Belgium
  • L-Thyroxine (veterinary use)
    Aesculaap, Netherlands
  • L-Thyroxin-ratiopharm
    Ratiopharm, Germany
  • Lucentis
    Berlin-Chemie, Latvia
  • Medithyrox
    Intermed, Greece
  • Meprobamate
    InvaGen, United States
  • Nei Zhang Qing (Levothyroxine and Liothyronine)
    Wujing Medicine, China
  • Novothyral
    Merck, Austria
  • Novothyral (Levothyroxine and Liothyronine)
    Merck, Switzerland; Merck, Poland; Merck KGaA, Romania; Merck Serono, Germany
  • Novotiral (Levothyroxine and Liothyronine)
    Merck, Mexico
  • Oroxine
    GlaxoSmithKline, Malaysia; Sigma, Australia
  • Pondtroxin
    Pond's Chemical, Thailand
  • Prothyrid (Levothyroxine and Liothyronine)
    Henning Berlin, Germany; Sanofi-Aventis, Germany
  • Puran T4
    Sanofi Aventis, Brazil
  • Soloxine (veterinary use)
    Virbac, United Kingdom
  • Synthroid
    Abbott, Brazil; Abbott, Canada; Abbott, Chile; Abbott, Colombia; Abbott, New Zealand; Abbott, Philippines; Abbott, United States
  • Synthyroid
    Bu Kwang, South Korea
  • Syntroxine
    IBSA Farmaceutici Italia, Italy
  • T4
    Montpellier, Argentina; Uni-Pharma, Greece
  • T4-Bago
    Bago, Chile
  • Tefor
    Schering-Plough, Turkey
  • Thyrax Duotab
    Organon, Netherlands
  • Thyrax
    Organon, Indonesia; Organon, Philippines; Organon, Venezuela; Schering-Plough, Portugal
  • Thyrex
    Sandoz, Austria
  • Thyrin
    Square, Bangladesh
  • Thyro-4
    Faran, Romania; Faran Laboratories, Greece
  • Thyrobest
    Bestochem, India
  • Thyrohormone
    Ni-The, Greece
  • Thyrolar (Levothyroxine and Liothyronine)
    Forest, United States
  • Thyronajod (Levothyroxine and Potassium Iodide)
    Henning Berlin, Germany; Sanofi-Aventis, Germany
  • Thyronorm
    Abbott, India
  • Thyrosit
    Sriprasit Dispensary, Thailand
  • Thyrowin
    Abbott, India
  • Thyroxin
    Orion, Finland
  • Thyroxine (veterinary use)
    Apex Laboratories, Australia
  • Thyroxine-Lam Thong
    Lam Thong, Thailand
  • Thyroxyl (veterinary use)
    Dechra, United Kingdom
  • Tigofar
    Farqui, Dominican Republic
  • Tiracrin
    Geymonat, Italy
  • Tirosint
    IBSA, Switzerland; IBSA Farmaceutici Italia, Italy
  • Tiroxin
    Metlen, Colombia
  • Tivoral
    Galenika, Serbia
  • Unithroid
    Watson, United States
  • You Xian
    Kangpu Pharmaceutical, China
  • Ze Ning
    Sichuan Hairong Pharmaceutical Co., Ltd, China
  • Berlthyrox
    Berlin-Chemie, Germany
  • Eferox Jod (Levothyroxine and Potassium Iodide)
    Aristo Pharma, Germany
  • L-Thyroxin Henning plus (Levothyroxine and Potassium Iodide)
    Henning Berlin, Germany; Sanofi-Aventis, Germany
  • L-Thyroxin Jod Aristo (Levothyroxine and Potassium Iodide)
    Aristo Pharma, Germany
  • Thevier
    Aspen, Germany

International Drug Name Search

Glossary

TermDefinition
BANBritish Approved Name
BANMBritish Approved Name (Modified)
DCFDénomination Commune Française
DCITDenominazione Comune Italiana
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name

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

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