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

Details

Stereochemistry ACHIRAL
Molecular Formula C10H16N6S
Molecular Weight 252.339
Optical Activity NONE
Defined Stereocenters 0 / 0
E/Z Centers 1
Charge 0

SHOW SMILES / InChI
Structure of CIMETIDINE

SMILES

CNC(NCCSCC1=C(C)NC=N1)=NC#N

InChI

InChIKey=AQIXAKUUQRKLND-UHFFFAOYSA-N
InChI=1S/C10H16N6S/c1-8-9(16-7-15-8)5-17-4-3-13-10(12-2)14-6-11/h7H,3-5H2,1-2H3,(H,15,16)(H2,12,13,14)

HIDE SMILES / InChI

Molecular Formula C10H16N6S
Molecular Weight 252.339
Charge 0
Count
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 1
Optical Activity NONE

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

Cimetidine is a histamine H2-receptor antagonist. It reduces basal and nocturnal gastric acid secretion and a reduction in gastric volume, acidity, and amount of gastric acid released in response to stimuli including food, caffeine, insulin, betazole, or pentagastrin. It is used to treat gastrointestinal disorders such as gastric or duodenal ulcer, gastroesophageal reflux disease, and pathological hypersecretory conditions. Cimetidine inhibits many of the isoenzymes of the hepatic CYP450 enzyme system. Other actions of Cimetidine include an increase in gastric bacterial flora such as nitrate-reducing organisms. Cimetidine binds to an H2-receptor located on the basolateral membrane of the gastric parietal cell, blocking histamine effects. This competitive inhibition results in reduced gastric acid secretion and a reduction in gastric volume and acidity.

CNS Activity

Curator's Comment: Enhanced cimetidine penetration of the blood brain barrier has been demonstrated in patients with liver disease.

Approval Year

Targets

Targets

Primary TargetPharmacologyConditionPotency
70.0 nM [Ki]
1.2 µM [IC50]
Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
TAGAMET

Approved Use

Treating and preventing ulcers of the stomach and small intestine, and treating gastroesophageal reflux disease (GERD). It may be used for treating esophagitis (inflammation of the esophagus) caused by acid reflux and certain conditions that cause increased acid secretion (eg, Zollinger-Ellison syndrome).

Launch Date

1995
Primary
TAGAMET

Approved Use

Treating and preventing ulcers of the stomach and small intestine, and treating gastroesophageal reflux disease (GERD). It may be used for treating esophagitis (inflammation of the esophagus) caused by acid reflux and certain conditions that cause increased acid secretion (eg, Zollinger-Ellison syndrome).

Launch Date

1995
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
1.056 μg/mL
200 mg single, oral
dose: 200 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
CIMETIDINE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
4.22 μg × h/mL
200 mg single, oral
dose: 200 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
CIMETIDINE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
T1/2

T1/2

ValueDoseCo-administeredAnalytePopulation
2.4 h
200 mg single, oral
dose: 200 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
CIMETIDINE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
Doses

Doses

DosePopulationAdverse events​
1200 mg 1 times / day multiple, oral
Highest studied dose
Dose: 1200 mg, 1 times / day
Route: oral
Route: multiple
Dose: 1200 mg, 1 times / day
Sources:
unhealthy, 50 years (range: 22-85 years)
Health Status: unhealthy
Age Group: 50 years (range: 22-85 years)
Sources:
Other AEs: Headache, Abdominal pain...
Other AEs:
Headache (2 patients)
Abdominal pain (2 patients)
Nausea (2 patients)
Anorexia (2 patients)
Vomiting (2 patients)
Sources:
20 g single, oral
Overdose
Dose: 20 g
Route: oral
Route: single
Dose: 20 g
Sources:
unhealthy, adult
Health Status: unhealthy
Age Group: adult
Sources:
3 g 4 times / day multiple, oral
Overdose
Dose: 3 g, 4 times / day
Route: oral
Route: multiple
Dose: 3 g, 4 times / day
Sources:
unhealthy, adult
Health Status: unhealthy
Age Group: adult
Sex: M
Sources:
300 mg 4 times / day multiple, respiratory
Recommended
Dose: 300 mg, 4 times / day
Route: respiratory
Route: multiple
Dose: 300 mg, 4 times / day
Sources:
unhealthy, adult
AEs

AEs

AESignificanceDosePopulation
Abdominal pain 2 patients
1200 mg 1 times / day multiple, oral
Highest studied dose
Dose: 1200 mg, 1 times / day
Route: oral
Route: multiple
Dose: 1200 mg, 1 times / day
Sources:
unhealthy, 50 years (range: 22-85 years)
Health Status: unhealthy
Age Group: 50 years (range: 22-85 years)
Sources:
Anorexia 2 patients
1200 mg 1 times / day multiple, oral
Highest studied dose
Dose: 1200 mg, 1 times / day
Route: oral
Route: multiple
Dose: 1200 mg, 1 times / day
Sources:
unhealthy, 50 years (range: 22-85 years)
Health Status: unhealthy
Age Group: 50 years (range: 22-85 years)
Sources:
Headache 2 patients
1200 mg 1 times / day multiple, oral
Highest studied dose
Dose: 1200 mg, 1 times / day
Route: oral
Route: multiple
Dose: 1200 mg, 1 times / day
Sources:
unhealthy, 50 years (range: 22-85 years)
Health Status: unhealthy
Age Group: 50 years (range: 22-85 years)
Sources:
Nausea 2 patients
1200 mg 1 times / day multiple, oral
Highest studied dose
Dose: 1200 mg, 1 times / day
Route: oral
Route: multiple
Dose: 1200 mg, 1 times / day
Sources:
unhealthy, 50 years (range: 22-85 years)
Health Status: unhealthy
Age Group: 50 years (range: 22-85 years)
Sources:
Vomiting 2 patients
1200 mg 1 times / day multiple, oral
Highest studied dose
Dose: 1200 mg, 1 times / day
Route: oral
Route: multiple
Dose: 1200 mg, 1 times / day
Sources:
unhealthy, 50 years (range: 22-85 years)
Health Status: unhealthy
Age Group: 50 years (range: 22-85 years)
Sources:
Overview

Overview

CYP3A4CYP2C9CYP2D6hERG



OverviewOther

Drug as perpetrator​

Drug as perpetrator​

TargetModalityActivityMetaboliteClinical evidence
yes [IC50 110 uM]
yes [IC50 149 uM]
yes [IC50 200 uM]
yes [IC50 210 uM]
yes [IC50 480 uM]
yes (co-administration study)
Comment: Coadministration with midazolam: [AUC(0-12)] and AUC(0-∞) values for midazolam were 507.0 ± 265.1 (40%) and 786.1 ± 365.2 (50%) nmol/mL · h, respectively;
Page: 4.0
yes [IC50 79 uM]
yes [Inhibition 10 uM]
yes [Ki 157.8 uM]
yes [Ki 2.1 uM]
yes [Ki 3.8 uM]
Drug as victimTox targets

Tox targets

TargetModalityActivityMetaboliteClinical evidence
PubMed

PubMed

TitleDatePubMed
Involvement of histaminergic receptor mechanisms in the stimulation of NT-3 synthesis in astrocytes.
2011-06
Two cases of h(2)-receptor antagonist hypersensitivity and cross-reactivity.
2011-04
Hepatoprotective, antinociceptive and antioxidant activities of cimetidine, ranitidine and famotidine as histamine H2 receptor antagonists.
2011-02
Gastroprotective mechanisms of Citrus lemon (Rutaceae) essential oil and its majority compounds limonene and β-pinene: involvement of heat-shock protein-70, vasoactive intestinal peptide, glutathione, sulfhydryl compounds, nitric oxide and prostaglandin E₂.
2011-01-15
OCT1 Expression in adipocytes could contribute to increased metformin action in obese subjects.
2011-01
Novel approaches to inhibition of gastric acid secretion.
2010-12
Drug interaction and pharmacist.
2010-07
Cimetidine induces apoptosis in gastric cancer cells in vitro and inhibits tumor growth in vivo.
2010-03
Size-dependent effects of nanoparticles on the activity of cytochrome P450 isoenzymes.
2010-02-01
Immune hemolytic anemia due to cimetidine: the first example of a cimetidine antibody.
2010-02
Bioactivation of lamotrigine in vivo in rat and in vitro in human liver microsomes, hepatocytes, and epidermal keratinocytes: characterization of thioether conjugates by liquid chromatography/mass spectrometry and high field nuclear magnetic resonance spectroscopy.
2010-01
Identification of a novel organic anion transporter mediating carnitine transport in mouse liver and kidney.
2010
Androgen action via testicular peritubular myoid cells is essential for male fertility.
2009-12
Enhanced ERbeta immunoexpression and apoptosis in the germ cells of cimetidine-treated rats.
2009-11-18
Antiulcer and anticonvulsant activity of Croton zambesicus.
2009-10
Ameliorative effects of histamine on spatial memory deficits induced by scopolamine infusion into bilateral dorsal or ventral hippocampus as evaluated by the radial arm maze task.
2009-08
Gastroprotective activity of alkaloid extract and 2-phenylquinoline obtained from the bark of Galipea longiflora Krause (Rutaceae).
2009-07-15
Pharmacokinetics of cimetidine in dogs after oral administration of cimetidine tablets.
2009-06
Ligand diversity of human and chimpanzee CYP3A4: activation of human CYP3A4 by lithocholic acid results from positive selection.
2009-06
Involvement of human multidrug and toxin extrusion 1 in the drug interaction between cimetidine and metformin in renal epithelial cells.
2009-04
The copper transporter Ctr1 contributes to cisplatin uptake by renal tubular cells during cisplatin nephrotoxicity.
2009-03
Contribution of mast cells to the oedema induced by Bothrops moojeni snake venom and a pharmacological assessment of the inflammatory mediators involved.
2009-02-16
Visions of drug discovery. Cimetidine (Tagamet).
2009-02
Inhibitory effects of the antiepileptic drug ethosuximide on G protein-activated inwardly rectifying K+ channels.
2009-02
Ocular surface tumors.
2009-01
Morphological evidences indicate that the interference of cimetidine on the peritubular components is responsible for detachment and apoptosis of Sertoli cells.
2008-05-09
Caki-1 cells as a model system for the interaction of renally secreted drugs with OCT3.
2008
Effect of sodium ozagrel on the activity of rat CYP2D6.
2007-11-14
Substrate specificity of MATE1 and MATE2-K, human multidrug and toxin extrusions/H(+)-organic cation antiporters.
2007-07-15
Cimetidine inhibits epidermal growth factor-induced cell signaling.
2007-03
Cimetidine induces apoptosis of human salivary gland tumor cells.
2007-03
[Usefulness of equations based on serum cystatin C concentration in the study of renal function].
2007
Molecular identification and functional characterization of rat multidrug and toxin extrusion type transporter 1 as an organic cation/H+ antiporter in the kidney.
2006-11
Identification and functional characterization of a new human kidney-specific H+/organic cation antiporter, kidney-specific multidrug and toxin extrusion 2.
2006-08
Cimetidine induces interleukin-18 production through H2-agonist activity in monocytes.
2006-08
Effect of endogenous histamine in the ventral hippocampus on fear memory deficits induced by scopolamine as evaluated by step-through avoidance response in rats.
2006-04-15
Is the monkey an appropriate animal model to examine drug-drug interactions involving renal clearance? Effect of probenecid on the renal elimination of H2 receptor antagonists.
2006-03
In vitro availability of metformin in presence of h(2) receptor antagonists.
2006-01
Putting theory into practice: James Black, receptor theory and the development of the beta-blockers at ICI, 1958-1978.
2006-01
Feasibility of biowaiver extension to biopharmaceutics classification system class III drug products: cimetidine.
2006
Cimetidine-induced tubulointerstitial nephritis with both MPO-ANCA and PR3-ANCA.
2005-12
Effects of histamine 2 receptor antagonists on endothelial-neutrophil adhesion and surface expression of endothelial adhesion molecules induced by high glucose levels.
2004-11-01
Decreased histamine H1 receptors in the frontal cortex of brains from patients with chronic schizophrenia.
1991-08-15
Diphenhydramine prevents the haemodynamic changes of cimetidine in ICU patients.
1991-03
Cimetidine inhibits catechol estrogen metabolism in women.
1991-02
Nifedipine versus cimetidine in prevention of stress-induced gastric ulcers in rats.
1991-01-03
Effects of antihistaminics on locomotor activity in mice. Comparison with opiate and amphetamine-induced hyperactivity.
1991
[Cimetidine-induced aplastic anemia complicated with nonbacterial thrombotic endocarditis and cerebral infarction].
1990-12
Hemodynamic effects of H2-receptor antagonists.
1990-11
[Confusion induced by the combination cimetidine-benzodiazepine; apropos of a case report].
1990-01
Patents

Sample Use Guides

Usual Adult Dose for Duodenal Ulcer Parenteral: 300 mg IV or IM every 6 to 8 hours. Alternatively, a continuous IV infusion may be administered at a rate of 37.5 to 50 mg/hour, or up to a maximum rate of 100 mg/hour (2.4 g/day). Oral: 800 mg to 1600 mg once a day at bedtime. Alternatively, dosage regimens of 300 mg four times per day, with meals and at bedtime, or 400 mg twice daily, in the morning and at bedtime, have shown to be effective.
Route of Administration: Other
Cimetidine (10(-7)M) inhibited IL-10 production and restored IL-12 secretion in LPS-treated murine DCs.
Substance Class Chemical
Created
by admin
on Mon Mar 31 18:10:47 GMT 2025
Edited
by admin
on Mon Mar 31 18:10:47 GMT 2025
Record UNII
80061L1WGD
Record Status Validated (UNII)
Record Version
  • Download
Name Type Language
ACILOC
Preferred Name English
CIMETIDINE
EP   HSDB   INN   MART.   MI   ORANGE BOOK   USAN   USP   USP-RS   VANDF   WHO-DD   WHO-IP  
USAN   INN  
Official Name English
CIMETIDINE [MI]
Common Name English
2-CYANO-1-METHYL-3-(2-(((5-METHYLIMIDAZOL-4-YL)METHYL)THIO)ETHYL)-GUANIDINE
Systematic Name English
CIMETIDINE [JAN]
Common Name English
CIMETIDINE [USAN]
Common Name English
BRUMETIDINA
Brand Name English
CIMETIDINE [IARC]
Common Name English
TAGAMET
Brand Name English
CIMAL
Brand Name English
CIMETIDINE [MART.]
Common Name English
ACINIL
Brand Name English
STOMEDINE
Brand Name English
DYSPAMET
Brand Name English
GASTROMET
Common Name English
Cimetidine [WHO-DD]
Common Name English
cimetidine [INN]
Common Name English
CIMETIDINUM [WHO-IP LATIN]
Common Name English
ULCEDIN
Brand Name English
ULCOMEDINA
Common Name English
CIMETIDINE [WHO-IP]
Common Name English
GUANIDINE, N''-CYANO-N-METHYL-N'-(2-(((5-METHYL-1H-IMIDAZOL-4-YL)METHYL)THIO)ETHYL)-
Systematic Name English
CIMETIDINE [HSDB]
Common Name English
SKF-92334
Code English
CIMETIDINE [USP-RS]
Common Name English
ULCIMET
Brand Name English
CIMETIDINE [USP MONOGRAPH]
Common Name English
CIMETIDINE [VANDF]
Common Name English
CIMETIDINE [EP MONOGRAPH]
Common Name English
CIMETIDINE [ORANGE BOOK]
Common Name English
NSC-335308
Code English
Classification Tree Code System Code
NCI_THESAURUS C29702
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
WHO-VATC QA02BA01
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
NDF-RT N0000000151
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
WHO-VATC QA02BA51
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
LIVERTOX NBK548130
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
WHO-ATC A02BA01
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
WHO-ATC A02BA51
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
NDF-RT N0000175784
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
Code System Code Type Description
NSC
335308
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
INN
3765
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
CAS
51481-61-9
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
SMS_ID
100000092793
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
CHEBI
50362
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
RS_ITEM_NUM
1134062
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
NCI_THESAURUS
C374
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
CHEBI
3699
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
MESH
D002927
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PRIMARY
MERCK INDEX
m3552
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY Merck Index
EPA CompTox
DTXSID4020329
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PRIMARY
EVMPD
SUB06279MIG
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PRIMARY
WIKIPEDIA
CIMETIDINE
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
LACTMED
Cimetidine
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
RXCUI
2541
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY RxNorm
HSDB
3917
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PRIMARY
ChEMBL
CHEMBL30
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
FDA UNII
80061L1WGD
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
IUPHAR
1231
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
DRUG BANK
DB00501
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
WHO INTERNATIONAL PHARMACOPEIA
CIMETIDINE
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY Description: A white to off-white powder; odourless or with a faint odour.Solubility: Sparingly soluble in water; very soluble in methanol R.Category: Antiulcer drug.Storage: Cimetidine should be kept in a well-closed container.
PUBCHEM
2756
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
ECHA (EC/EINECS)
257-232-2
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
DAILYMED
80061L1WGD
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
DRUG CENTRAL
645
Created by admin on Mon Mar 31 18:10:47 GMT 2025 , Edited by admin on Mon Mar 31 18:10:47 GMT 2025
PRIMARY
Related Record Type Details
TRANSPORTER -> SUBSTRATE
BINDER->LIGAND
BINDING
TRANSPORTER -> SUBSTRATE
TRANSPORTER -> INHIBITOR
TRANSPORTER -> SUBSTRATE
TRANSPORTER -> INHIBITOR
TRANSPORTER -> SUBSTRATE
Vmax
TRANSPORTER -> SUBSTRATE
Vmax
METABOLIC ENZYME -> INHIBITOR
TRANSPORTER -> SUBSTRATE
Km
TRANSPORTER -> SUBSTRATE
TRANSPORTER -> SUBSTRATE
TRANSPORTER -> SUBSTRATE
Km
METABOLIC ENZYME -> INHIBITOR
TRANSPORTER -> INHIBITOR
TRANSPORTER -> INHIBITOR
TRANSPORTER -> INHIBITOR
TARGET -> AGONIST
IC50
TARGET -> INHIBITOR
BINDING
IC50
Related Record Type Details
METABOLITE -> PARENT
METABOLITE -> PARENT
MAJOR
URINE
Related Record Type Details
ACTIVE MOIETY
Name Property Type Amount Referenced Substance Defining Parameters References
Biological Half-life PHARMACOKINETIC
Volume of Distribution PHARMACOKINETIC