U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

Details

Stereochemistry ACHIRAL
Molecular Formula C4H6N2S
Molecular Weight 114.169
Optical Activity NONE
Defined Stereocenters 0 / 0
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of METHIMAZOLE

SMILES

CN1C=CNC1=S

InChI

InChIKey=PMRYVIKBURPHAH-UHFFFAOYSA-N
InChI=1S/C4H6N2S/c1-6-3-2-5-4(6)7/h2-3H,1H3,(H,5,7)

HIDE SMILES / InChI

Molecular Formula C4H6N2S
Molecular Weight 114.169
Charge 0
Count
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 0
Optical Activity NONE

Description
Curator's Comment: Description was created based on several sources, including https://www.drugs.com/cdi/methimazole.html

Methimazole (also known as Tapazole or Thiamazole or MMI) is an antithyroid drug. Methimazole binds to thyroid peroxidase and thereby inhibits the conversion of iodide to iodine. Thyroid peroxidase normally converts iodide to iodine (via hydrogen peroxide as a cofactor) and also catalyzes the incorporation of the resulting iodide molecule onto both the 3 and/or 5 positions of the phenol rings of tyrosines found in thyroglobulin. Thyroglobulin is degraded to produce thyroxine (T4) and tri-iodothyronine (T3), which are the main hormones produced by the thyroid gland. So methimazole effectively inhibits the production of new thyroid hormones. Methimazole is used for the treatment of hyperthyroidism, goiter, Graves disease and psoriasis.

Originator

Curator's Comment: In 1949, Stanley and Astwood first introduced methimazole

Approval Year

Targets

Targets

Primary TargetPharmacologyConditionPotency
Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
Tapazole

Approved Use

TAPAZOLE is indicated: In patients with Graves’ disease with hyperthyroidism or toxic multinodular goiter for whom surgery or radioactive iodine therapy is not an appropriate treatment option. To ameliorate symptoms of hyperthyroidism in preparation for thyroidectomy or radioactive iodine therapy.

Launch Date

-6.1646399E11
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
248 ng/mL
10 mg single, oral
dose: 10 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
213 ng/mL
0.17 mg/kg bw single, oral
dose: 0.17 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FED
299 ng/mL
0.21 mg/kg bw single, oral
dose: 0.21 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
380 ng/mL
0.3 mg/kg bw single, oral
dose: 0.3 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
803 ng/mL
0.57 mg/kg bw single, oral
dose: 0.57 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
1661 μg × h/L
10 mg single, oral
dose: 10 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
2657 ng × h/mL
0.17 mg/kg bw single, oral
dose: 0.17 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FED
3228 ng × h/mL
0.21 mg/kg bw single, oral
dose: 0.21 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
4773 ng × h/mL
0.3 mg/kg bw single, oral
dose: 0.3 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
7136 ng × h/mL
0.57 mg/kg bw single, oral
dose: 0.57 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
1833 μg × h/L
10 mg single, intravenous
dose: 10 mg
route of administration: Intravenous
experiment type: SINGLE
co-administered:
METHIMAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
2450 ng × h/mL
0.16 mg/kg bw single, intravenous
dose: 0.16 mg/kg bw
route of administration: Intravenous
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FED
2922 ng × h/mL
0.21 mg/kg bw single, intravenous
dose: 0.21 mg/kg bw
route of administration: Intravenous
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
T1/2

T1/2

ValueDoseCo-administeredAnalytePopulation
5.3 h
10 mg single, oral
dose: 10 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
14 h
0.17 mg/kg bw single, oral
dose: 0.17 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FED
14 h
0.21 mg/kg bw single, oral
dose: 0.21 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
20.1 h
0.3 mg/kg bw single, oral
dose: 0.3 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
15 h
0.57 mg/kg bw single, oral
dose: 0.57 mg/kg bw
route of administration: Oral
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
5.3 h
10 mg single, intravenous
dose: 10 mg
route of administration: Intravenous
experiment type: SINGLE
co-administered:
METHIMAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
20.7 h
0.16 mg/kg bw single, intravenous
dose: 0.16 mg/kg bw
route of administration: Intravenous
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FED
18.5 h
0.21 mg/kg bw single, intravenous
dose: 0.21 mg/kg bw
route of administration: Intravenous
experiment type: SINGLE
co-administered:
METHIMAZOLE serum
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FED
Overview

Overview

CYP3A4CYP2C9CYP2D6hERG



OverviewOther

Other InhibitorOther SubstrateOther Inducer






Drug as perpetrator​
PubMed

PubMed

TitleDatePubMed
Sequencing, expression, and characterization of cDNA expressed flavin-containing monooxygenase 2 from mouse.
2001
Body, heart, thyroid gland and skeletal muscle weight changes in rats with altered thyroid status.
2001
Drug-induced congenital defects: strategies to reduce the incidence.
2001
Role of thyroid hormones in the maturation and organisation of rat barrel cortex.
2001
[Ablative therapy for immune hyperthyroidism in patients with ophthalmopathy].
2001
The activity of antioxidant enzymes and the content of uncoupling protein-1 in the brown adipose tissue of hypothyroid rats: comparison with effects of iopanoic acid.
2001
[Graves-Basedow disease associated with unusual variation of thyroid papillary carcinoma: a clinical case].
2001 Apr-Jun
Estimation of antithyroid drug dose in Graves' disease: value of quantification of thyroid blood flow with color duplex sonography.
2001 Aug
[Long-term results of ultrasound-guided ethanol injections in patients with autonomous thyroid nodules and hyperthyroidism].
2001 Aug 15
Clinical practice. Subclinical hyperthyroidism.
2001 Aug 16
Protracted expression of serotonin transporter and altered thalamocortical projections in the barrelfield of hypothyroid rats.
2001 Dec
Hypothyroidism induces type I iodothyronine deiodinase expression in tilapia liver.
2001 Dec
Impact of hyperthyroidism and its correction on vascular reactivity in humans.
2001 Dec 18
The systolic function of the left ventricle of the heart in patients with hyperthyroidism during therapy.
2001 Feb
A case of thyrotoxicosis with pancytopenia.
2001 Jun
Influence of hypothyroid state on 45Ca(2+) influx and sensitivity of rat uterus to nifedipine and diltiazem.
2001 Jun 15
[Effect of thyroxine upon prevention of recurrence of Graves' disease treated with antithyroid drugs].
2001 Mar 10
Methimazole-induced pulmonary hemorrhage associated with antimyeloperoxidase-antineutrophil cytoplasmic antibody: a case report.
2001 Nov
Hyperemesis gravidarum associated with thyrotoxicosis and a past history of an eating disorder.
2001 Nov
Influence of nicotinamide on the radiosensitivity of normal and goitrous thyroid in the rat.
2001 Nov
Adverse effects of prenatal methimazole exposure.
2001 Nov
Effect of eicosapentaenoic acid ethyl ester on hypothyroid function.
2001 Nov
Different role of insulin in GLUT-1 and -4 regulation in heart and skeletal muscle during perinatal hypothyroidism.
2001 Nov
Apoptosis, necrosis, and cell proliferation induced by S-(1,2-dichlorovinyl)-L-cysteine in primary cultures of human proximal tubular cells.
2001 Nov 15
Effects of neonatal hypothyroidism on the expressions of growth cone proteins and axon guidance molecules related genes in the hippocampus.
2001 Nov 26
Severe myocardial ischemia following hormone replacement in two cases of hypothyroidism with normal coronary arteriogram.
2001 Oct
Risk of torsades de pointes from oral erythromycin with concomitant carbimazole (methimazole) administration.
2001 Oct
Suppression of serum TSH by Graves' Ig: evidence for a functional pituitary TSH receptor.
2001 Oct
Use of oral cholecystographic agents in the treatment of amiodarone-induced hyperthyroidism.
2001 Oct
Selective effect of hypothyroidism on expression of myelin markers during development.
2001 Oct 15
Thyroid hormones modify susceptibility to lidocaine-kindling in rats.
2001 Oct 19
Antithyroid drugs as a factor influencing the outcome of radioiodine therapy in Graves' disease and toxic nodular goitre?
2001 Sep
Effect of losartan on sodium appetite of hypothyroid rats subjected to water and sodium depletion and water, sodium and food deprivation.
2001 Sep
Thyroid hormone regulates oxidative phosphorylation in the cerebral cortex and striatum of neonatal rats.
2001 Sep
Ca(2+)/nicotinamide adenine dinucleotide phosphate-dependent H(2)O(2) generation is inhibited by iodide in human thyroids.
2001 Sep
The effect of methimazole on thyroid uptake of pertechnetate and radioiodine in normal cats.
2001 Sep-Oct
Neonatal hyperthyroidism in infants of mothers previously thyroidectomized due to Graves' disease.
2001 Sep-Oct
Dermatomyositis and Graves' disease.
2001 Sep-Oct
Severe embryopathy and exposure to methimazole in early pregnancy.
2002 Feb
Cell necrosis and apoptosis are differentially regulated during goitre development and iodine-induced involution.
2002 Feb
Influence of hypothyroidism on circulating concentrations and liver expression of IGF-binding proteins mRNA from neonatal and adult rats.
2002 Feb
Clinical features and outcomes in children with antineutrophil cytoplasmic autoantibody-positive glomerulonephritis associated with propylthiouracil treatment.
2002 Feb
Depigmentation of brown Guinea pig skin by topical application of methimazole.
2002 Jan
Severe and mild neonatal hypothyroidism mediate opposite effects on Leydig cells of rats.
2002 Jan
Teratogen update: antithyroid drugs-methimazole, carbimazole, and propylthiouracil.
2002 Jan
Methimazole-induced asthma?
2002 Jan
Identification of active flavin-containing monooxygenase isoform 2 in human lung and characterization of expressed protein.
2002 Jan
Polarization IR spectra of model crystals containing cyclic N-H...S bonded dimers: 2-mercaptothiazoline and 2-mercapto-1-methylimidazole.
2002 Jan 15
Streptozotocin diabetes protects against arrhythmias in rat isolated hearts: role of hypothyroidism.
2002 Jan 25
Subclinical hyperthyroidism.
2002 Jan 3
Patents

Sample Use Guides

Usual Adult Dose for Hyperthyroidism Initial: Mild hyperthyroidism: 5 mg orally every 8 hours. Moderately severe hyperthyroidism: 10 mg orally every 8 hours (up to 40 mg per day). Severe hyperthyroidism: 20 mg orally every 8 hours. Maintenance: 5 to 15 mg orally daily.
Route of Administration: Oral
Methimazole had the strongest antioxidative properties in human erythrocytes at the concentration level of 0.5 mM
Substance Class Chemical
Created
by admin
on Fri Dec 16 16:03:04 UTC 2022
Edited
by admin
on Fri Dec 16 16:03:04 UTC 2022
Record UNII
554Z48XN5E
Record Status Validated (UNII)
Record Version
  • Download
Name Type Language
METHIMAZOLE
HSDB   MI   ORANGE BOOK   USP   USP-RS   VANDF  
Common Name English
1-Methylimidazole-2-thiol
Systematic Name English
METHIMAZOLE [MI]
Common Name English
METHIMAZOLE [VANDF]
Common Name English
METHIMAZOLE [ORANGE BOOK]
Common Name English
METHIMAZOLE [USP-RS]
Common Name English
NSC-38608
Code English
2H-IMIDAZOLE-2-THIONE, 1,3-DIHYDRO-1-METHYL-
Systematic Name English
TAPAZOLE
Brand Name English
THIAMAZOLE [MART.]
Common Name English
THIAMAZOLE
EP   INN   MART.   WHO-DD  
INN  
Official Name English
THIAMAZOLE [EP MONOGRAPH]
Common Name English
Thiamazole [WHO-DD]
Common Name English
thiamazole [INN]
Common Name English
MERCAPTIZOLE
Brand Name English
METHIMAZOLE [USP MONOGRAPH]
Common Name English
METHIMAZOLE [HSDB]
Common Name English
METHIMAZOLE [IARC]
Common Name English
THIAMAZOLE [JAN]
Common Name English
Classification Tree Code System Code
IARC Methimazole
LIVERTOX NBK548406
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
CFR 21 CFR 520.1372
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
EPA PESTICIDE CODE 600093
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
NDF-RT N0000175918
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
FDA ORPHAN DRUG 539116
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
WHO-ATC H03BB52
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
WHO-ATC H03BB02
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
NDF-RT N0000175917
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
WHO-VATC QH03BB02
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
FDA ORPHAN DRUG 523216
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
WHO-VATC QH03BB52
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
NCI_THESAURUS C885
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
Code System Code Type Description
IUPHAR
6649
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
DRUG BANK
DB00763
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
EVMPD
SUB10967MIG
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
NCI_THESAURUS
C641
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
EPA CompTox
DTXSID4020820
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
HSDB
3361
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
RXCUI
6835
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY RxNorm
DRUG CENTRAL
1745
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
RS_ITEM_NUM
1411005
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
CAS
60-56-0
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
FDA UNII
554Z48XN5E
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
ChEMBL
CHEMBL1515
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
NSC
38608
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
CHEBI
50673
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
MESH
D008713
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
LACTMED
Methimazole
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
DAILYMED
554Z48XN5E
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
INN
4198
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
ECHA (EC/EINECS)
200-482-4
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
MERCK INDEX
M7313
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY Merck Index
PUBCHEM
1349907
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
WIKIPEDIA
METHIMAZOLE
Created by admin on Fri Dec 16 16:03:04 UTC 2022 , Edited by admin on Fri Dec 16 16:03:04 UTC 2022
PRIMARY
Related Record Type Details
TRANSPORTER -> INHIBITOR
Related Record Type Details
IMPURITY -> PARENT
CHROMATOGRAPHIC PURITY (GC)
EP
IMPURITY -> PARENT
CHROMATOGRAPHIC PURITY (GC)
EP
IMPURITY -> PARENT
CHROMATOGRAPHIC PURITY (GC)
EP
Related Record Type Details
ACTIVE MOIETY