thiamazole ๐Ÿถ Veterinary Use | Indications/Contra | FAERs-F | FAERs-M | Orange Bk | BioActivity |

Stem definitionDrug idCAS RN
1745 60-56-0

Description:

MoleculeDescription

Molfile Inchi Smiles

Synonyms:

  • methimazole
  • methylimidazolethiol
  • thyrozol
  • thymidazole
  • thymidazol
  • thycapzol
  • thiamazole
  • tapazole
  • methymazol
A thioureylene antithyroid agent that inhibits the formation of thyroid hormones by interfering with the incorporation of iodine into tyrosyl residues of thyroglobulin. This is done by interfering with the oxidation of iodide ion and iodotyrosyl groups through inhibition of the peroxidase enzyme.
  • Molecular weight: 114.17
  • Formula: C4H6N2S
  • CLOGP: -0.34
  • LIPINSKI: 0
  • HAC: 2
  • HDO: 1
  • TPSA: 15.27
  • ALOGS: -1
  • ROTB: 0

  • Status: OFP

  • Legend:
    OFP - off patent
    OFM - off market
    ONP - on patent

Drug dosage:

DoseUnitRoute
10 mg O

ADMET properties:

PropertyValueReference
MRTD (Maximum Recommended Therapeutic Daily Dose) 8.76 ยตM/kg/day Contrera JF, Matthews EJ, Kruhlak NL, Benz RD
BDDCS (Biopharmaceutical Drug Disposition Classification System) 1 Hosey CM, Chan R, Benet LZ
BA (Bioavailability) 93 % Kim MT, Sedykh A, Chakravarti SK, Saiakhov RD, Zhu H
Vd (Volume of distribution) 0.86 L/kg Lombardo F, Berellini G, Obach RS
CL (Clearance) 3.70 mL/min/kg Lombardo F, Berellini G, Obach RS
t_half (Half-life) 2.40 hours Lombardo F, Berellini G, Obach RS

Approvals:

DateAgencyCompanyOrphan
June 21, 1950 FDA

FDA Adverse Event Reporting System (Female)

MedDRA adverse event termLikelihood ratioLikelihood ratio thresholdPatients taking drug having adverse eventPatients taking drug not having adverse eventPatients not taking drug having adverse eventPatients not taking drug not having adverse event
Hyperthyroidism 393.53 13.81 126 8680 13226 56270035
Agranulocytosis 379.28 13.81 140 8666 22519 56260742
Thyrotoxic crisis 277.92 13.81 55 8751 776 56282485
Hypothyroidism 70.98 13.81 54 8752 38142 56245119
Antithyroid arthritis syndrome 66.56 13.81 9 8797 4 56283257
Choanal atresia 59.34 13.81 9 8797 20 56283241
Exophthalmos 45.55 13.81 14 8792 1278 56281983
Neutropenia 41.18 13.81 82 8724 158085 56125176
Blood thyroid stimulating hormone decreased 38.47 13.81 17 8789 4316 56278945
Rheumatoid arthritis 37.99 13.81 7 8799 382597 55900664
Drug-induced liver injury 34.05 13.81 34 8772 34428 56248833
Jaundice cholestatic 31.59 13.81 16 8790 5503 56277758
Goitre 31.44 13.81 16 8790 5557 56277704
Dysmorphism 30.90 13.81 12 8794 2201 56281060
Insulin autoimmune syndrome 30.28 13.81 6 8800 85 56283176
Toxic nodular goitre 29.86 13.81 5 8801 25 56283236
Anti-neutrophil cytoplasmic antibody positive vasculitis 29.11 13.81 12 8794 2571 56280690
Thyroxine free increased 29.02 13.81 9 8797 846 56282415
Cardiac arrest 26.45 13.81 48 8758 86266 56196995
Pulmonary alveolar haemorrhage 26.28 13.81 13 8793 4251 56279010
Mucocutaneous candidiasis 25.77 13.81 4 8802 11 56283250
Aplasia cutis congenita 25.35 13.81 5 8801 69 56283192
Polyarthritis 24.76 13.81 16 8790 8712 56274549
Endocrine ophthalmopathy 24.43 13.81 7 8799 501 56282760
Drug interaction 24.24 13.81 80 8726 209675 56073586
Drug intolerance 23.91 13.81 6 8800 264812 56018449
Oropharyngeal pain 23.67 13.81 45 8761 83743 56199518
Stevens-Johnson syndrome 23.57 13.81 23 8783 22640 56260621
Cardiac failure 21.86 13.81 43 8763 82050 56201211
Arthropathy 21.34 13.81 3 8803 200272 56082989
Eosinophilic pleural effusion 20.73 13.81 4 8802 49 56283212
Respiratory syncytial virus infection 20.57 13.81 12 8794 5449 56277812
Acquired epidermolysis bullosa 20.23 13.81 4 8802 56 56283205
Thyroid disorder 20.11 13.81 17 8789 13921 56269340
Toxic goitre 20.00 13.81 3 8803 6 56283255
Hypoglycaemia 19.64 13.81 33 8773 55782 56227479
Sopor 19.49 13.81 20 8786 20902 56262359
Thyroidectomy 19.44 13.81 7 8799 1042 56282219
Functional residual capacity increased 19.23 13.81 4 8802 73 56283188
Autoimmune neutropenia 19.18 13.81 4 8802 74 56283187
Thyroid haemorrhage 19.13 13.81 4 8802 75 56283186
Electrocardiogram QT prolonged 18.84 13.81 32 8774 54556 56228705
Hepatitis cholestatic 18.79 13.81 12 8794 6402 56276859
Symptom masked 18.40 13.81 6 8800 663 56282598
Multiple organ dysfunction syndrome 18.30 13.81 31 8775 52739 56230522
Hypersensitivity vasculitis 18.23 13.81 10 8796 4038 56279223
Atrial fibrillation 17.79 13.81 47 8759 108850 56174411
Clinodactyly 17.47 13.81 4 8802 116 56283145
Contraindicated product administered 17.23 13.81 4 8802 186282 56096979
Therapeutic product effect decreased 17.00 13.81 3 8803 169449 56113812
Thyroxine free abnormal 16.93 13.81 3 8803 22 56283239
Neuroglycopenia 16.67 13.81 5 8801 420 56282841
Exposure during pregnancy 16.63 13.81 53 8753 136289 56146972
Systemic lupus erythematosus 16.40 13.81 4 8802 180074 56103187
Metabolic function test abnormal 15.81 13.81 4 8802 178 56283083
Febrile neutropenia 15.68 13.81 44 8762 105501 56177760
Spigelian hernia 15.68 13.81 3 8803 35 56283226
Microscopic polyangiitis 15.38 13.81 4 8802 199 56283062
Kidney transplant rejection 15.19 13.81 9 8797 4204 56279057
Systemic candida 15.06 13.81 8 8798 3033 56280228
Tri-iodothyronine free increased 14.95 13.81 4 8802 222 56283039
Thyroiditis 14.90 13.81 7 8799 2045 56281216
Mucosal erosion 14.46 13.81 6 8800 1305 56281956
Renal infarct 14.16 13.81 6 8800 1376 56281885
Acute generalised exanthematous pustulosis 14.16 13.81 12 8794 9857 56273404
Thyroid function test abnormal 14.15 13.81 8 8798 3425 56279836
Hepatitis 13.88 13.81 22 8784 35419 56247842

FDA Adverse Event Reporting System (Male)

MedDRA adverse event termLikelihood ratioLikelihood ratio thresholdPatients taking drug having adverse eventPatients taking drug not having adverse eventPatients not taking drug having adverse eventPatients not taking drug not having adverse event
Hyperthyroidism 389.17 18.72 110 3859 9521 31683854
Agranulocytosis 85.16 18.72 45 3924 21202 31672173
Thyrotoxic crisis 65.58 18.72 14 3955 368 31693007
Thyrotoxic periodic paralysis 63.37 18.72 11 3958 91 31693284
Hypothyroidism 60.74 18.72 34 3935 17913 31675462
Kounis syndrome 46.06 18.72 15 3954 2069 31691306
Polymerase chain reaction 43.46 18.72 8 3961 95 31693280
Goitre 33.56 18.72 11 3958 1548 31691827
Albumin urine present 33.18 18.72 8 3961 366 31693009
Exomphalos 33.08 18.72 7 3962 176 31693199
Urine leukocyte esterase positive 31.43 18.72 8 3961 458 31692917
Cholestatic liver injury 31.12 18.72 11 3958 1943 31691432
Product administered to patient of inappropriate age 30.53 18.72 12 3957 2845 31690530
Thyroiditis 30.13 18.72 11 3958 2132 31691243
Haemoglobinuria 29.51 18.72 8 3961 586 31692789
Mouth swelling 28.80 18.72 10 3959 1676 31691699
Pericarditis fungal 28.24 18.72 6 3963 154 31693221
Urinary bladder rupture 25.27 18.72 5 3964 89 31693286
Urine ketone body present 24.76 18.72 8 3961 1076 31692299
Autoimmune thyroiditis 24.61 18.72 8 3961 1097 31692278
Respiratory tract haemorrhage 24.28 18.72 8 3961 1143 31692232
Glycosuria 23.96 18.72 8 3961 1192 31692183
Axial spondyloarthritis 23.36 18.72 6 3963 356 31693019
Loss of proprioception 23.15 18.72 6 3963 369 31693006
Tracheo-oesophageal fistula 22.16 18.72 6 3963 437 31692938
Blood cyanide increased 22.01 18.72 4 3965 44 31693331
Coagulation time shortened 20.90 18.72 5 3964 221 31693154
Drug-induced liver injury 20.70 18.72 20 3949 24343 31669032
Blood sodium decreased 19.89 18.72 16 3953 15299 31678076

FDA Adverse Event Reporting System (Geriatric)

MedDRA adverse event termLikelihood ratioLikelihood ratio thresholdPatients taking drug having adverse eventPatients taking drug not having adverse eventPatients not taking drug having adverse eventPatients not taking drug not having adverse event
Hyperthyroidism 660.43 13.24 208 11361 19883 70896992
Agranulocytosis 410.43 13.24 176 11393 40122 70876753
Thyrotoxic crisis 323.28 13.24 67 11502 1153 70915722
Hypothyroidism 117.46 13.24 80 11489 45675 70871200
Antithyroid arthritis syndrome 66.19 13.24 9 11560 4 70916871
Thyrotoxic periodic paralysis 59.83 13.24 11 11558 97 70916778
Goitre 50.63 13.24 22 11547 5144 70911731
Exophthalmos 50.19 13.24 16 11553 1578 70915297
Drug-induced liver injury 45.84 13.24 51 11518 56062 70860813
Anti-neutrophil cytoplasmic antibody positive vasculitis 42.26 13.24 17 11552 3280 70913595
Polymerase chain reaction 39.43 13.24 8 11561 123 70916752
Endocrine ophthalmopathy 37.07 13.24 10 11559 549 70916326
Kounis syndrome 34.98 13.24 15 11554 3396 70913479
Product administered to patient of inappropriate age 32.93 13.24 16 11553 4827 70912048
Thyroiditis 32.56 13.24 15 11554 4021 70912854
Jaundice cholestatic 30.78 13.24 19 11550 9165 70907710
Cardiac arrest 30.43 13.24 75 11494 159759 70757116
Cardiac failure 30.17 13.24 70 11499 143471 70773404
Blood thyroid stimulating hormone decreased 28.27 13.24 15 11554 5439 70911436
Neutropenia 28.11 13.24 99 11470 257057 70659818
Albumin urine present 26.38 13.24 8 11561 669 70916206
Pericarditis fungal 26.05 13.24 6 11563 171 70916704
Thyroxine free increased 25.71 13.24 9 11560 1184 70915691
Polyarthritis 25.67 13.24 18 11551 10738 70906137
Haemoglobinuria 25.50 13.24 8 11561 749 70916126
Rheumatoid arthritis 25.40 13.24 8 11561 291797 70625078
Hepatitis cholestatic 25.26 13.24 19 11550 12631 70904244
Toxic goitre 24.26 13.24 4 11565 17 70916858
Autoimmune thyroiditis 24.06 13.24 12 11557 3830 70913045
Drug intolerance 23.98 13.24 4 11565 225683 70691192
Urinary bladder rupture 22.99 13.24 5 11564 109 70916766
Drug interaction 22.53 13.24 122 11447 381319 70535556
Pulseless electrical activity 22.37 13.24 18 11551 13197 70903678
Atrial fibrillation 21.90 13.24 73 11496 184275 70732600
Cardiogenic shock 21.44 13.24 28 11541 36279 70880596
Hepatitis 21.32 13.24 33 11536 49947 70866928
Insulin autoimmune syndrome 21.26 13.24 6 11563 390 70916485
Blood cyanide increased 20.95 13.24 4 11565 44 70916831
Toxic nodular goitre 20.56 13.24 4 11565 49 70916826
Cholestatic liver injury 20.31 13.24 11 11558 4157 70912718
Electrocardiogram QT prolonged 20.09 13.24 43 11526 83474 70833401
Pulmonary alveolar haemorrhage 19.44 13.24 15 11554 10354 70906521
Respiratory tract haemorrhage 19.21 13.24 8 11561 1684 70915191
Functional residual capacity increased 18.87 13.24 4 11565 77 70916798
Urine leukocyte esterase positive 18.82 13.24 10 11559 3635 70913240
Tonsillitis 18.81 13.24 12 11557 6128 70910747
Acquired epidermolysis bullosa 18.45 13.24 4 11565 86 70916789
Completed suicide 18.42 13.24 7 11562 227128 70689747
Mucocutaneous candidiasis 18.40 13.24 4 11565 87 70916788
Sopor 18.29 13.24 24 11545 31243 70885632
Thyroid haemorrhage 17.87 13.24 4 11565 100 70916775
Glycosuria 17.43 13.24 8 11561 2127 70914748
Jaundice 17.20 13.24 30 11539 50078 70866797
Oropharyngeal pain 17.06 13.24 44 11525 96266 70820609
Coagulation time shortened 16.69 13.24 5 11564 401 70916474
Thyroidectomy 16.62 13.24 6 11563 863 70916012
Respiratory syncytial virus infection 16.41 13.24 12 11557 7643 70909232
Neuroglycopenia 16.39 13.24 5 11564 426 70916449
Thyroid dermatopathy 16.26 13.24 3 11566 27 70916848
Tonsillitis bacterial 15.99 13.24 4 11565 163 70916712
Ventricular septal defect 15.75 13.24 5 11564 486 70916389
Cholestasis 15.58 13.24 28 11541 47844 70869031
Antineutrophil cytoplasmic antibody 15.48 13.24 3 11566 36 70916839
Hypersensitivity vasculitis 15.32 13.24 11 11558 6811 70910064
Mouth swelling 15.27 13.24 10 11559 5339 70911536
Arthropathy 15.20 13.24 3 11566 150054 70766821
Metabolic function test abnormal 15.19 13.24 4 11565 200 70916675
Immune-mediated hepatitis 15.19 13.24 8 11561 2858 70914017
Pericardial haemorrhage 14.73 13.24 9 11560 4259 70912616
Tri-iodothyronine increased 14.68 13.24 4 11565 228 70916647
Symptom masked 14.50 13.24 6 11563 1243 70915632
Tri-iodothyronine free increased 14.19 13.24 4 11565 259 70916616
Urine ketone body present 13.96 13.24 8 11561 3371 70913504
Pure white cell aplasia 13.73 13.24 3 11566 67 70916808
Hypoglycaemia 13.62 13.24 40 11529 94324 70822551
Bradycardia 13.61 13.24 48 11521 124567 70792308
Eosinophilic pleural effusion 13.52 13.24 4 11565 307 70916568

FDA Adverse Event Reporting System (Pediatric)

None

Pharmacologic Action:

SourceCodeDescription
ATC H03BB02 SYSTEMIC HORMONAL PREPARATIONS, EXCL. SEX HORMONES AND INSULINS
THYROID THERAPY
ANTITHYROID PREPARATIONS
Sulfur-containing imidazole derivatives
ATC H03BB52 SYSTEMIC HORMONAL PREPARATIONS, EXCL. SEX HORMONES AND INSULINS
THYROID THERAPY
ANTITHYROID PREPARATIONS
Sulfur-containing imidazole derivatives
MeSH PA D013956 Antithyroid Agents
MeSH PA D006727 Hormone Antagonists
FDA MoA N0000175917 Thyroid Hormone Synthesis Inhibitors
FDA EPC N0000175918 Thyroid Hormone Synthesis Inhibitor
CHEBI has role CHEBI:50671 antithyroid drugs

Drug Use | Suggest Off label Use Form| |View source of the data|

DiseaseRelationSNOMED_IDDOID
Hyperthyroidism indication 34486009 DOID:7998
Thyrotoxic crisis off-label use 29028009 DOID:12837
Agranulocytosis contraindication 17182001 DOID:12987
Hypothyroidism contraindication 40930008 DOID:1459
Factor II deficiency contraindication 73975000
Leukopenia contraindication 84828003 DOID:615
Pancytopenia contraindication 127034005 DOID:12450
Liver function tests abnormal contraindication 166603001
Drug-induced hepatitis contraindication 235876009
Pregnancy, function contraindication 289908002
Thrombocytopenic disorder contraindication 302215000 DOID:1588
Bone marrow depression contraindication 307762000




๐Ÿถ Veterinary Drug Use

None

๐Ÿถ Veterinary products

ProductApplicantIngredients
Felimazole Dechra, Ltd. 1

Acid dissociation constants calculated using MoKa v3.0.0

Dissociation levelDissociation constantType (acidic/basic)
pKa1 10.7 acidic

Orange Book patent data (new drug applications)

None

Orange Book exclusivity data (new drug applications)

None

Bioactivity Summary:

TargetClassPharosUniProtActionTypeActivity value
(-log[M])
Mechanism
action
Bioact sourceMoA source
Thyroid peroxidase Enzyme INHIBITOR IC50 5.57 WOMBAT-PK CHEMBL
Lactoperoxidase Enzyme IC50 4.93 CHEMBL
Lactoperoxidase Enzyme IC50 5.08 CHEMBL
Dopamine beta-hydroxylase Enzyme Ki 4.35 CHEMBL

External reference:

IDSource
4017434 VUID
N0000145822 NUI
D00401 KEGG_DRUG
4017434 VANDF
C0025644 UMLSCUI
CHEBI:50673 CHEBI
MMZ PDB_CHEM_ID
CHEMBL1515 ChEMBL_ID
DB00763 DRUGBANK_ID
6649 IUPHAR_LIGAND_ID
554Z48XN5E UNII
1349907 PUBCHEM_CID
224936 RXNORM
2293 MMSL
31962 MMSL
5073 MMSL
d00290 MMSL
002139 NDDF
37656002 SNOMEDCT_US
404864000 SNOMEDCT_US
D008713 MESH_DESCRIPTOR_UI
4198 INN_ID

Pharmaceutical products:

ProductCategoryIngredientsNDCFormQuantityRouteMarketingLabel
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 0185-0205 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 0185-0210 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 23155-070 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 23155-070 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 23155-071 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 23155-071 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 42254-008 TABLET 5 mg ORAL ANDA 18 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 42254-009 TABLET 10 mg ORAL ANDA 18 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 49884-640 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 49884-640 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 49884-641 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 49884-641 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 50090-2366 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 50090-3334 TABLET 5 mg ORAL ANDA 20 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 51293-820 TABLET 5 mg ORAL ANDA 18 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 51293-821 TABLET 10 mg ORAL ANDA 18 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 53808-0850 TABLET 10 mg ORAL ANDA 18 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 53808-0949 TABLET 10 mg ORAL ANDA 18 sections
METHIMAZOLE HUMAN PRESCRIPTION DRUG LABEL 1 53808-1044 TABLET 10 mg ORAL ANDA 18 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 54868-5135 TABLET 10 mg ORAL ANDA 18 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 54868-6071 TABLET 5 mg ORAL ANDA 18 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60429-380 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60429-380 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60429-381 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60429-381 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60687-357 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60687-357 TABLET 5 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60687-370 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60687-370 TABLET 10 mg ORAL ANDA 19 sections
Methimazole HUMAN PRESCRIPTION DRUG LABEL 1 60687-669 TABLET 5 mg ORAL ANDA 20 sections