Note: 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 oral/injection
• Levothyroxine (Injection)
• Levothyroxine (Oral)
• Levothyroxine Capsules
• Levothyroxine Injection Solution
• Levothyroxine Oral Solution
• Levothyroxine Tablets
• Levothyroxine Capsule
• Levothyroxine Injection

Scheme

BAN

CAS registry number (Chemical Abstracts Service)

0000051-48-9

Chemical Formula

C15-H10-I4-N-O4

Molecular Weight

776

Therapeutic Categories

Thyroid hormone

Hormone replacement therapy (HRT)

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)
• L-Thyroxine (IS)
• Thyroxine (IS)
• Thyroxinum laevogirum (IS)
• Thyroxinum (PH: Ph. Helv. VI)
• Lévothyroxine sodique (OS: DCF)
• Levothyroxine Sodium (OS: BANM)
• Levotiroxina sodica (OS: DCIT)
• Thyroxin-Natrium (IS)
• Thyroxinum natricum (IS)
• Lévothyroxine sodique (PH: Ph. Eur. 9)
• Levothyroxine Sodium (PH: BP 2018, Ph. Int. 7, USP 41)
• Levothyroxine sodium (PH: Ph. Eur. 9)
• Levothyroxin-Natrium (PH: Ph. Eur. 9)
• Levothyroxinum natricum (PH: Ph. Eur. 9, Ph. Int. 7)
• Levothyroxine Sodium Hydrate (OS: JAN)
• UNII-9J765S329G (IS)
• Lévothyroxine sodique (PH: Ph. Eur. 9)
• Levothyroxine sodium (PH: Ph. Eur. 9, Ph. Int. 4)
• Levothyroxine Sodium Hydrate (PH: JP XVII)
• Levothyroxinnatrium (PH: Ph. Eur. 9)
• Levothyroxinum natricum (PH: Ph. Eur. 9)

Brand Names

• Berlthyrox
  Berlin-Chemie, Tunisia; Menarini, Lebanon
• Bitiron [+ Liothyronine]
  Abdi Ibrahim, Turkey
• Dermocinetic [+ Escin]
  Geymonat, Italy
• Eltroxin
  Glaxo Smithkline, Lebanon; GlaxoSmithKline, Egypt
• Euthycin
  Incepta, Bangladesh
• Euthyrox
  Merck, Egypt; Merck Kgaa, Lebanon
• Leutiral
  Silanes, Mexico
• Lévothyrox
  Merck Santé, Tunisia
• Levothyroxin Stada 100 μg
  Stada Arzneimittel, Austria
• Levothyroxin Stada 125 μg
  Stada Arzneimittel, Austria
• Levothyroxin Stada 150 μg
  Stada Arzneimittel, Austria
• Levothyroxin Stada 175 μg
  Stada Arzneimittel, Austria
• Levothyroxin Stada 200 μg
  Stada Arzneimittel, Austria
• Levothyroxin Stada 50 μg
  Stada Arzneimittel, Austria
• Levothyroxin Stada 75 μg
  Stada Arzneimittel, Austria
• Levotiron
  Abdi Ibrahim, Turkey
• L-Thyroxin Henning
  Organon, Latvia
• Novothyral [+ Liothyronine]
  Sanolabor, Slovenia
• Somatoline [+ Escin]
  Manetti Roberts, Italy
• T4 Pharma Arte
  Pharma Arte, Paraguay
• T4 Thyro
  MUP, Egypt
• T4-Bago 150
  Bago, Peru
• Thiroyd
  Greater Pharma, Thailand
• Thyro-4
  Angelini, Tunisia
• Thyroid-S
  Sriprasit Pharma, Thailand
• Thyrox
  Renata, Bangladesh
• Tiroidina [+ Liothyronine]
  Dispert, Uruguay
• Tirosint
  IBSA Farmaceutici Italia, Italy
• Tiroxin
  Metlen, Ecuador
• Tyraxin
  Memphis Co., Egypt
• Accu-Thyrox
  Galenica, Romania
• Accu-thyrox 100mcg
  Galenica, Bulgaria
• Accu-thyrox 25mcg
  Galenica, Bulgaria
• Accu-thyrox 50mcg
  Galenica, Bulgaria
• Aliasint
  IBSA Farmaceutici Italia, Italy
• Boncheck
  Bonapharm, Peru
• Cynocuatro
  Valeant Grossman, Mexico
• Cynoplus [+ Liothyronine]
  Valeant Grossman, Mexico
• Dexnon
  Kern Pharma, Spain
• Diotroxin [+ Liothyronine]
  Pharmacare, South Africa
• Dobesium
  Pharmacheck, Peru
• Eferox
  Aristo Pharma, Germany
• Eltroxin
  Alfred Gera, Malta; Aspen, Czech Republic; Aspen, Lithuania; Aspen, New Zealand; Aspen, Philippines; Aspen, Poland; Aspen Nordic, Denmark; Aspen Pharmacare, Australia; Aspen Pharmacare, Canada; Aspen Pharmacare/Menarini, Singapore; Concordia, United Kingdom; Glaxo Wellcome, Lithuania; GlaxoSmithKline, Bangladesh; GlaxoSmithKline, India; GlaxoSmithKline, Kuwait; GlaxoSmithKline, Taiwan; GlaxoSmithKline, South Africa; Mercury, Malta
• Eltroxin 100mcg
  Aspen, Israel
• Eltroxin 50mcg
  Aspen, Israel; Aspen Pharma, Oman
• Eltroxin/Levothyroxine
  Alfred Gera, Malta
• Eltroxin/Thyroxine
  Mercury, Malta
• Eltroxin-LF 0.05mg
  Alfasigma, Switzerland
• Eltroxin-LF 0.1mg
  Alfasigma, Switzerland
• Eurolev
  Renata, Philippines
• Euthyral [+ Liothyronine]
  Merck Serono, France
• Euthyrox
  BModesto, Netherlands; Dr. Fisher Farma, Netherlands; Elea, Argentina; Eureco-Pharma, Netherlands; Euro Registratie, Netherlands; Merck, Bosnia & Herzegowina; Merck, Brazil; Merck, Czech Republic; Merck, Denmark; Merck, Georgia; Merck, Greece; Merck, Croatia (Hrvatska); Merck, Indonesia; Merck, Norway; Merck, Philippines; Merck, Serbia; Merck, Sweden; Merck, Slovakia; Merck, Turkey; Merck, Venezuela; Merck A E Hellas, Cyprus; Merck Consumer Healthcare, Belgium; Merck Healthcare, Netherlands; Merck KGaA, Iceland; Merck KGaA, Macedonia; Merck KGaA, Romania; Merck Sereno, Latvia; Merck Serono, China; Merck Serono, Germany; Merck Serono, Malaysia; Merck Serono, Russian Federation; Merck Serono, South Africa; Merck Merck Serono Division, Singapore
• Euthyrox 100
  Merck, Switzerland; Merck, Lithuania
• Euthyrox 100 µg
  Merck, Austria; Merck, Bulgaria; Merck, Hungary; Merck KGaA, Oman
• Euthyrox 100mcg
  Merck, Luxembourg; Merck Serono Ltd, Israel
• Euthyrox 112 µg
  Merck, Austria
• Euthyrox 125
  Merck, Switzerland
• Euthyrox 125 µg
  Merck, Austria; Merck, Bulgaria; Merck, Hungary
• Euthyrox 125mcg
  Merck, Luxembourg
• Euthyrox 137 µg
  Merck, Austria
• Euthyrox 150
  Merck, Switzerland
• Euthyrox 150 µg
  Merck, Austria; Merck, Hungary; Merck KGaA, Oman
• Euthyrox 150mcg
  Merck, Luxembourg
• Euthyrox 175
  Merck, Switzerland
• Euthyrox 175 µg
  Merck, Austria; Merck, Hungary
• Euthyrox 175mcg
  Merck, Luxembourg
• Euthyrox 200
  Merck, Switzerland
• Euthyrox 200 µg
  Merck, Austria
• Euthyrox 200mcg
  Merck, Luxembourg
• Euthyrox 25
  Merck, Switzerland
• Euthyrox 25 µg
  Merck, Austria; Merck, Bulgaria; Merck KGaA, Oman
• Euthyrox 25mcg
  Merck, Luxembourg
• Euthyrox 50
  Merck, Switzerland
• Euthyrox 50 µg
  Merck, Austria; Merck, Bulgaria; Merck, Hungary; Merck KGaA, Oman
• Euthyrox 50mcg
  Merck, Luxembourg; Merck Serono Ltd, Israel
• Euthyrox 75
  Merck, Switzerland
• Euthyrox 75 µg
  Merck, Austria; Merck, Bulgaria; Merck, Hungary
• Euthyrox 75mcg
  Merck, Luxembourg
• Euthyrox 88 µg
  Merck, Austria
• Euthyrox N
  Merck, Poland
• Eutirox
  Bracco, Italy; Merck, Chile; Merck, Colombia; Merck, Ecuador; Merck, Mexico; Merck, Peru; Merck, Portugal; Merck S.L., Spain
• Eutroxsig
  Aspen Pharmacare, Australia
• Forthyron [veterinary use]
  Albrecht, Germany; Dechra, Norway; Eurovet Animal Health, Belgium; Eurovet Animal Health BV, United Kingdom; Selectavet, Germany
• Forthyron 200 µg für Hunde [veterinary use]
  Eurovet Animal Health, Austria
• Forthyron 200 microgram voor honden [veterinary use]
  Eurovet Animal Health, Netherlands
• Forthyron 200 mikrogramow dla psow For dogs [veterinary use]
  Eurovet Animal Health, Poland
• Forthyron 400 µg für Hunde [veterinary use]
  Eurovet Animal Health, Austria
• Forthyron 400 microgram voor honden [veterinary use]
  Eurovet Animal Health, Netherlands
• Forthyron 400 mikrogramow dla psow For dogs [veterinary use]
  Eurovet Animal Health, Poland
• Forthyron 600 microgram voor honden [veterinary use]
  Eurovet Animal Health, Netherlands
• Forthyron 600 mikrogramow dla psow For dogs [veterinary use]
  Eurovet Animal Health, Poland
• Forthyron 800 microgram voor honden [veterinary use]
  Eurovet Animal Health, Netherlands
• Forthyron 800 mikrogramow dla psow For dogs [veterinary use]
  Eurovet Animal Health, Poland
• Forthyron F M pour chiens [veterinary use]
  Dechra Veterinary Products, France
• Forthyron F S pour chiens [veterinary use]
  Dechra Veterinary Products, France
• Forthyron F XL pour chiens [veterinary use]
  Dechra Veterinary Products, France
• Forthyron Smak [veterinary use]
  Dechra, Finland; Dechra, Sweden
• Goldshield Levothyroxine
  Goldshield Pharmaceuticals, Hong Kong
• Jaroxin
  Jayson, Bangladesh
• Jodthyrox [+ Potassium Iodide]
  Merck, Austria; Merck, Czech Republic; Merck, Poland; Merck Serono, Germany
• Karet
  Armstrong Laboratorios de Mexico, Mexico
• L Thyroxine SERB
  SERB Laboratoires, France
• Letrox
  Berlin Chemie, Bosnia & Herzegowina; Berlin-Chemie, China; Berlin-Chemie, Czech Republic; Berlin-Chemie, Croatia (Hrvatska); Berlin-Chemie, Macedonia; Berlin-Chemie/ Menarini, Poland
• Letrox 100
  Berlin-Chemie, Serbia
• Letrox 100 µg
  Berlin-Chemie, Hungary
• Letrox 125 µg
  Berlin-Chemie, Hungary
• Letrox 150
  Berlin-Chemie, Serbia
• Letrox 50
  Berlin-Chemie, Serbia
• Letrox 50 µg
  Berlin-Chemie, Hungary
• Letrox 75 µg
  Berlin-Chemie, Hungary
• Letter
  Sanofi, Portugal
• Levaxin
  Sanolabor, Slovenia; Takeda, Norway; Takeda Pharma, Sweden; Takeda Pharma A/S, Iceland
• Leventa [veterinary use]
  Intervet, Belgium; Intervet, United Kingdom; Intervet, Netherlands; Intervet, Sweden; Intervet Ireland, Ireland; MSD, New Zealand; MSD Animal Health, Switzerland; MSD Santé Animale Intervet, France
• Levo-4
  Rafarm, Greece
• Levoid
  Aché, Brazil
• Levolet
  Hamad, Bahrain
• Levothyrox
  Merck KGaA, Vietnam; Merck Serono, France
• Levothyroxine
  Actavis, Indonesia; Actavis UK, United Kingdom; Actavis UK, Malta; APP, Hong Kong; Boucher & Muir, New Zealand; Colonis Pharma, United Kingdom; Concordia, United Kingdom; Jensonr Plus, United Kingdom; Teva, Malta; Wockhardt UK, United Kingdom
• Levothyroxine - ZhongLian Pharm
  ZhongLian Pharm, China
• Levothyroxine Actavis
  Actavis, Hong Kong
• Lévothyroxine Biogaran
  Biogaran, France
• Levothyroxine Mercury Pharma
  Mercury, Malta
• Levothyroxine natrium Uni-Pharma
  Uni-Pharma, Netherlands
• Levothyroxine P & D
  P & D, Malta
• Levothyroxine Sodium
  EMD Serono, United States; Fresenius Kabi, United States; Mylan, United States; Par Pharmaceutical, United States
• Levothyroxine Sodium Fresenius Kabi
  Fresenius Kabi Canada, Canada
• Levothyroxine Sodium Vale
  Vale Pharmaceuticals, Poland
• Levothyroxine Teva
  Teva Pharmaceuticals, Poland
• Levothyroxine Wockhardt
  Wockhardt, Malta
• Levothyroxine-Humanity
  Par, Georgia
• Levothyroxinenatrium Teva
  Teva Nederland, Netherlands
• Levotiroteg
  Laboratorio Tecnoquímicas, Guatemala; Laboratorio Tecnoquímicas, Honduras; Laboratorio Tecnoquímicas, El Salvador
• Levotirox Lafedar
  Lafedar, Argentina
• Levotiroxina
  ADN Pharma, Mexico
• Levotiroxina Fabra 100
  Fabra, Argentina
• Levotiroxina GlaxoSmithKline
  GlaxoSmithKline, Paraguay
• Levo-tiroxina GlaxoSmithKline
  GlaxoSmithKline, Argentina
• Levotiroxina MK
  MK, Colombia
• Levotiroxina Norpharm
  Norpharm, Italy
• Levotiroxina Sanofi
  Sanofi-Aventis, Spain
• Levotiroxina Sodica 100 Gramon Bago
  Gramón Bagó, Uruguay
• Levotiroxina Sodica 150 Gramon Bago
  Gramón Bagó, Uruguay
• Levotiroxina Sodica 50 Gramon Bago
  Gramón Bagó, Uruguay
• Levotiroxina Sodica Andromaco
  Laboratorios Andromaco, Chile
• Levotiroxina Sodica L.CH.
  Chile S.A., Paraguay; Laboratorio Chile, Chile
• Levotiroxina Sódica Merck
  Merck, Brazil
• Levotiroxina Sodica Ratiopharm
  Ratiopharm, Spain
• Levotiroxina Sódica Ratiopharm
  Ratiopharm, Portugal
• Levotiroxina Sodica Teva
  Teva, Spain
• Levoxyl
  King Pharmaceuticals, United States
• L-Thyrox HEXAL
  Hexal, Germany
• L-Thyrox Jod HEXAL [+ Potassium Iodide]
  Hexal, Germany
• L-Thyroxin - 1 A Pharma
  1 A Pharma, Germany
• L-Thyroxin 100 Berlin-Chemie
  Berlin-Chemie AG, Bulgaria
• L-Thyroxin 150 Berlin-Chemie
  Berlin-Chemie AG, Bulgaria
• L-Thyroxin 50 Berlin-Chemie
  Berlin-Chemie AG, Bulgaria
• L-Thyroxin 75 Berlin-Chemie
  Berlin-Chemie AG, Bulgaria
• L-Thyroxin AL
  Aliud Pharma, Germany
• L-Thyroxin Aristo
  Aristo Pharma, Germany
• L-Thyroxin Aventis
  Sanofi, Germany
• L-Thyroxin Berlin
  Berlin-Chemie, Latvia
• L-Thyroxin Berlin-Chemie
  Berlin-Chemie, Estonia; Berlin-Chemie, Georgia; Berlin-Chemie, Lithuania; Berlin-Chemie, Slovakia
• L-Thyroxin beta
  Betapharm, Germany
• L-Thyroxin Henning
  Henning Berlin, Germany; LENIS, Slovenia
• L-Thyroxin Henning 100
  Henning Berlin, Germany
• L-Thyroxin Henning 100 µg
  Sanofi-Aventis, Hungary
• L-Thyroxin Henning 100 plus [+ Potassium Iodide]
  Henning Berlin, Germany
• L-Thyroxin Henning 125
  Henning Berlin, Germany
• L-Thyroxin Henning 150
  Henning Berlin, Germany
• L-Thyroxin Henning 175
  Henning Berlin, Germany
• L-Thyroxin Henning 200
  Henning Berlin, Germany
• L-Thyroxin Henning 25
  Henning Berlin, Germany
• L-Thyroxin Henning 50
  Henning Berlin, Germany
• L-Thyroxin Henning 50 µg
  Sanofi-Aventis, Hungary
• L-Thyroxin Henning 50 plus [+ Potassium Iodide]
  Henning Berlin, Germany
• L-Thyroxin Henning 75
  Henning Berlin, Germany
• L-Thyroxin Jod - 1A-Pharma [+ Potassium Iodide]
  1 A Pharma, Germany
• L-Thyroxin Jod Winthrop [+ Potassium Iodide]
  Zentiva Pharma, Germany
• L-Thyroxin Winthrop
  Zentiva Pharma, Germany
• L-Thyroxin-CT
  AbZ-Pharma, Germany
• L-Thyroxine
  Takeda Belgium, Belgium; IFET, Greece
• L-Thyroxine [veterinary use]
  Aesculaap, Netherlands
• L-Thyroxine Sandoz
  Sandoz, Lithuania
• L-Thyroxine SERB
  SERB Laboratoires, France
• L-Thyroxin-Na AbZ
  AbZ-Pharma, Germany
• L-Thyroxin-Na-CT
  AbZ-Pharma, Germany
• L-Thyroxin-Na-ratiopharm
  ratiopharm, Germany
• Medithyrox
  Intermed, Greece
• Mercury Pharma Levothyroxine
  Mercury Pharma, Hong Kong
• Nei Zhang Qing [+ Liothyronine]
  Wujing Medicine, China
• Novothyral [+ Liothyronine]
  Merck, Austria; Merck, Switzerland; Merck, Chile; Merck, Poland; Merck, Slovakia; Merck KGaA, Romania
• Novothyral 100 [+ Liothyronine]
  Merck, Luxembourg; Merck Serono, Germany
• Novothyral 75 [+ Liothyronine]
  Merck, Luxembourg; Merck Serono, Germany
• Novotiral [+ Liothyronine]
  Merck, Mexico
• Novtirox
  Aspen Pharma, Slovenia
• Oroxin
  Aspen, Ireland
• Oroxine
  Aspen, Malaysia; Aspen Pharmacare, Australia
• Prothyrid [+ Liothyronine]
  Henning Berlin, Germany; Sanofi, Germany
• Puran T4
  Sanofi-Aventis Farmaceutica, Brazil
• RO
  Milefar, Uruguay
• Soloxine [veterinary use]
  Virbac France, United Kingdom; Virbac S.A., Ireland
• Synthroid
  Abbott, Colombia; Abbott, South Africa; Abbott Laboratorios do Brasil, Brazil; AbbVie, United States; Mylan, New Zealand
• Synthroid 100mcg
  Abbvie, Israel
• Synthroid 50mcg
  Abbvie, Israel
• Synthyroxine
  Dalim, South Korea
• Syntroxine
  IBSA, Czech Republic
• Syntroxine 100 µg
  IBSA, Hungary
• Syntroxine 112 µg
  IBSA, Hungary
• Syntroxine 125 µg
  IBSA, Hungary
• Syntroxine 13 µg
  IBSA, Hungary
• Syntroxine 137 µg
  IBSA, Hungary
• Syntroxine 150 µg
  IBSA, Hungary
• Syntroxine 175 µg
  IBSA, Hungary
• Syntroxine 200 µg
  IBSA, Hungary
• Syntroxine 25 µg
  IBSA, Hungary
• Syntroxine 50 µg
  IBSA, Hungary
• Syntroxine 75 µg
  IBSA, Hungary
• Syntroxine 88 µg
  IBSA, Hungary
• T4
  Uni-Pharma Kleon Isetis, Cyprus
• T4 Bago
  Bago, Paraguay
• T4 Montpellier
  Montpellier, Argentina
• T4 Montpellier 100
  Montpellier, Argentina
• T4 Montpellier 112
  Montpellier, Argentina
• T4 Montpellier 125
  Montpellier, Argentina
• T4 Montpellier 137
  Montpellier, Argentina
• T4 Montpellier 150
  Montpellier, Argentina
• T4 Montpellier 175
  Montpellier, Argentina
• T4 Montpellier 200
  Montpellier, Argentina
• T4 Montpellier 25
  Montpellier, Argentina
• T4 Montpellier 50
  Montpellier, Argentina
• T4 Montpellier 75
  Montpellier, Argentina
• T4 Montpellier 88
  Montpellier, Argentina
• T4 Pharmetica
  Pharmetica, Paraguay
• T4-Bago
  Laboratorio Bago, Chile; Bago, Peru
• Tamidan
  Actavis International, Vietnam
• Tecuatro 100mcg
  Dispert, Uruguay
• Tecuatro 125mcg
  Dispert, Uruguay
• Tecuatro 150mcg
  Dispert, Uruguay
• Tecuatro 200mcg
  Dispert, Uruguay
• Tecuatro 25mcg
  Dispert, Uruguay
• Tecuatro 50mcg
  Dispert, Uruguay
• Tecuatro 75mcg
  Dispert, Uruguay
• Tefor
  VLD, Turkey
• TevaThyrox
  Teva, Bulgaria
• Tezarin
  World Medicine, Georgia
• Thevier
  Aspen Pharma Trading Limited, Netherlands
• Thevier 100
  Aspen Pharma, Germany
• Thydin
  MedChoice, Philippines
• Thyforon [veterinary use]
  Eurovet Animal Health, Ireland; Eurovet Animal Health BV, United Kingdom
• Thynor
  Eskayef, Bangladesh
• Thyrax
  Aspen, Philippines; Aspen, Portugal; Organon, Venezuela; Quamed, Indonesia
• Thyrax Duotab
  Aspen Pharma Trading Limited, Netherlands
• Thyrex 100 µg
  Sandoz, Austria
• Thyrex 125 µg
  Sandoz, Austria
• Thyrex 160 µg
  Sandoz, Austria
• Thyrex 25 µg
  Sandoz, Austria
• Thyrex 50 µg
  Sandoz, Austria
• Thyrex 75 µg
  Sandoz, Austria
• Thyrin
  Square, Bangladesh
• Thyro Canine [veterinary use]
  Lloyd, United States
• Thyro-4
  Angelini Pharma, Greece; Faran Laboratories, Greece
• Thyrobest
  Bestochem, India
• Thyrocare
  Olcare Laboratories, India
• Thyrofix
  Uni-Pharma, Netherlands
• Thyrohormone
  Ni-The, Greece
• Thyrolar
  Acme, Bangladesh
• Thyrolar [+ Liothyronine]
  Forest, United States
• Thyromac 0.1
  Macleods Pharm, Peru
• Thyronajod 100 Henning [+ Potassium Iodide]
  Henning Berlin, Germany; Sanofi, Germany
• Thyronajod 125 Henning [+ Potassium Iodide]
  Henning Berlin, Germany; Sanofi, Germany
• Thyronajod 150 Henning [+ Potassium Iodide]
  Henning Berlin, Germany; Sanofi, Germany
• Thyronajod 50 Henning [+ Potassium Iodide]
  Henning Berlin, Germany; Sanofi, Germany
• Thyronajod 75 Henning [+ Potassium Iodide]
  Henning Berlin, Germany; Sanofi, Germany
• Thyronorm
  Abbott, India
• Thyrorich
  Primus, India
• Thyrosit
  Sriprasit Pharma, Thailand
• Thyrotab
  Ibn Sina, Bangladesh
• Thyrowin
  AHPL, India
• Thyroxal 200 microgram voor honden en katten [veterinary use]
  AST, Netherlands
• Thyroxal 600 [veterinary use]
  AST, Netherlands
• Thyroxanil [veterinary use]
  Le Vet Pharma B.V., United Kingdom; Vetcare, Finland
• Thyroxanil 200μg für Hunde und Katzen For dogs and cats [veterinary use]
  Le Vet, Austria
• Thyroxanil 600μg für Hunde und Katzen For dogs and cats [veterinary use]
  Le Vet, Austria
• Thyroxanil L voor honden en katten [veterinary use]
  Le Vet, Netherlands
• Thyroxanil S voor honden en katten [veterinary use]
  Le Vet, Netherlands
• Thyroxantil vet [veterinary use]
  Le Vet, Estonia; Le Vet, Iceland
• Thyroxin
  Orion Pharma, Finland
• Thyroxine Actavis
  Actavis, Hong Kong
• Thyroxine for Dogs and Cats [veterinary use]
  Apex Laboratories, Australia
• Thyroxine Oral for Dogs [veterinary use]
  Apex Laboratories, Australia
• Thyroxine-Lam Thong
  Lam Thong, Thailand
• Tiracrin
  Geymonat, Italy
• Tiroide Amsa [+ Liothyronine]
  AMSA, Italy
• Tiroidine
  Sanofi-Aventis, Mexico
• Tirosint
  AMSA, Italy; IBSA, Slovakia; IBSA, United States; IBSA Farmaceutici Italia Srl., Greece; IBSA Scandinavia, Denmark; Proton Pharma, Greece
• Tirosint 100mcg
  IBSA, Switzerland
• Tirosint 112mcg
  IBSA, Switzerland
• Tirosint 125mcg
  IBSA, Switzerland
• Tirosint 137mcg
  IBSA, Switzerland
• Tirosint 13mcg
  IBSA, Switzerland
• Tirosint 150mcg
  IBSA, Switzerland
• Tirosint 175mcg
  IBSA, Switzerland
• Tirosint 200mcg
  IBSA, Switzerland
• Tirosint 25mcg
  IBSA, Switzerland
• Tirosint 50mcg
  IBSA, Switzerland
• Tirosint 75mcg
  IBSA, Switzerland
• Tirosint 88mcg
  IBSA, Switzerland
• Tiroxin
  Siegfried, Colombia
• Tivoral
  Galenika, Bosnia & Herzegowina; Galenika AD, Serbia
• Tyroid
  ACI, Bangladesh
• Unithroid
  Jerome Stevens Pharmaceuticals, United States
• Wethyrox [veterinary use]
  WDT, Germany
• Wolarex
  Teva Pharmaceuticals, Poland
• You Xian
  Kangpu Pharmaceutical, China
• Ze Ning
  Sichuan Hairong Pharmaceutical Co., Ltd, China
• Eferox Jod [+ Potassium Iodide]
  Aristo Pharma, Germany
• Eltroxin
  Aspen Oss, Netherlands
• Leventa [veterinary use]
  MSD, Germany; MSD Animal Health, Italy; Selectavet, Germany
• Levothyroxine CF
  Centrafarm, Netherlands
• Levothyroxine Na Sandoz
  Sandoz, Japan
• Levothyroxine Nycomed
  Takeda Nederland, Netherlands
• Levothyroxine Sodium
  Fera Pharmaceuticals, United States
• Levothyroxine Stada
  STADA Nordic, Sweden
• L-Thyroxin Henning 75 plus [+ Potassium Iodide]
  Henning Berlin, Germany
• L-Thyroxin Jod Aristo [+ Potassium Iodide]
  Aristo Pharma, Germany
• L-Thyroxine-Christiaens 100mcg
  Takeda, Luxembourg
• L-Thyroxine-Christiaens 125mcg
  Takeda, Luxembourg
• L-Thyroxine-Christiaens 150mcg
  Takeda, Luxembourg
• L-Thyroxine-Christiaens 175mcg
  Takeda, Luxembourg
• L-Thyroxine-Christiaens 200mcg
  Takeda, Luxembourg
• L-Thyroxine-Christiaens 25mcg
  Takeda, Luxembourg
• L-Thyroxine-Christiaens 50mcg
  Takeda, Luxembourg
• L-Thyroxine-Christiaens 75mcg
  Takeda, Luxembourg
• Oroxine
  Aspen, Sweden
• Synthroid
  BGP Pharma, Canada
• Thevier 50
  Aspen Pharma, Germany
• Thyradin S
  ASKA Seiyaku Asuka, Japan
• Thyradin S 0.01%
  ASKA Seiyaku Asuka, Japan
• Thyrofix
  Uni-Pharma, Sweden
• Tirosint
  IBSA, Netherlands

Glossary

Further information on drug naming conventions: International Nonproprietary Names.