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Details

Stereochemistry ACHIRAL
Molecular Formula C17H18N3O2S
Molecular Weight 328.409
Optical Activity NONE
Defined Stereocenters 0 / 0
E/Z Centers 0
Charge 1

SHOW SMILES / InChI
Structure of 3,10-DIMETHOXY-2,4-DIMETHYL-5H-BENZO(4,5)IMIDAZO(1,2-B)PYRIDO(1,2-D)(1,2,4)THIADIAZIN-13-IUM

SMILES

COC1=CC=C2N3SCC4=C(C)C(OC)=C(C)C=[N+]4C3=NC2=C1

InChI

InChIKey=ULDYIZLGTORGDF-UHFFFAOYSA-N
InChI=1S/C17H18N3O2S/c1-10-8-19-15(11(2)16(10)22-4)9-23-20-14-6-5-12(21-3)7-13(14)18-17(19)20/h5-8H,9H2,1-4H3/q+1

HIDE SMILES / InChI

Molecular Formula C17H18N3O2S
Molecular Weight 328.409
Charge 1
Count
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 0
Optical Activity NONE

Esomeprazole strontium is a proton pump inhibitor. It suppresses gastric acid secretion by specific inhibition H+/K+ ATPase in the gastric parietal cell. The S- and R-isomers of omeprazole are protonated and converted in the acidic compartment of the parietal cell forming the active inhibitor, the achiral sulphenamide. By acting specifically on the proton pump, esomeprazole blocks the final step in acid production, thus reducing gastric acidity. The drug is indicated for the treatment of gastroesophageal reflux disease, reduction the risk of NSAID-associated gastric ulcer, eradication of H.pylori, and pathological hypersecretory conditions.

CNS Activity

Curator's Comment: Known to be CNS penetrant in mouse. Human data not available

Approval Year

Targets

Targets

Primary TargetPharmacologyConditionPotency
Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
NEXIUM 24HR

Approved Use

treats frequent heartburn (occurs 2 or more days a week)

Launch Date

2014
Primary
PRILOSEC

Approved Use

PRILOSEC is a proton pump inhibitor indicated for: treatment of duodenal ulcer in adults, treatment of gastric ulcer in adults. Treatment of Gastroesophageal Reflux Disease. Maintenance of healing of erosive esophagitis in pediatric patients and adults. Treatment of pathological hypersecretory conditions in adults.

Launch Date

2008
Primary
PRILOSEC

Approved Use

PRILOSEC is a proton pump inhibitor indicated for: treatment of duodenal ulcer in adults, treatment of gastric ulcer in adults. Treatment of Gastroesophageal Reflux Disease. Maintenance of healing of erosive esophagitis in pediatric patients and adults. Treatment of pathological hypersecretory conditions in adults.

Launch Date

2008
Primary
PRILOSEC

Approved Use

PRILOSEC is a proton pump inhibitor indicated for: treatment of duodenal ulcer in adults, treatment of gastric ulcer in adults. Treatment of Gastroesophageal Reflux Disease. Maintenance of healing of erosive esophagitis in pediatric patients and adults. Treatment of pathological hypersecretory conditions in adults.

Launch Date

1989
Primary
PRILOSEC

Approved Use

PRILOSEC is a proton pump inhibitor indicated for: treatment of duodenal ulcer in adults, treatment of gastric ulcer in adults. Treatment of Gastroesophageal Reflux Disease. Maintenance of healing of erosive esophagitis in pediatric patients and adults. Treatment of pathological hypersecretory conditions in adults.

Launch Date

2008
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
668 ng/mL
1 mg/kg single, oral
dose: 1 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
OMEPRAZOLE plasma
Homo sapiens
population: UNKNOWN
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
7.5 μM
40 mg 1 times / day multiple, intravenous
dose: 40 mg
route of administration: Intravenous
experiment type: MULTIPLE
co-administered:
ESOMEPRAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
1200 nM*h
20 mg single, oral
dose: 20 mg
route of administration: oral
experiment type: single
co-administered:
OMEPRAZOLE plasma
Homo sapiens
population: healthy
age: adults
sex:
food status:
1220 ng × h/mL
1 mg/kg single, oral
dose: 1 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
OMEPRAZOLE plasma
Homo sapiens
population: UNKNOWN
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
1179 nM × h
20 mg 1 times / day multiple, oral
dose: 20 mg
route of administration: Oral
experiment type: MULTIPLE
co-administered:
OMEPRAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
16.2 μM × h
40 mg 1 times / day multiple, intravenous
dose: 40 mg
route of administration: Intravenous
experiment type: MULTIPLE
co-administered:
ESOMEPRAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
T1/2

T1/2

ValueDoseCo-administeredAnalytePopulation
0.58 h
20 mg 1 times / day multiple, oral
dose: 20 mg
route of administration: Oral
experiment type: MULTIPLE
co-administered:
OMEPRAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
1.4 h
40 mg 1 times / day multiple, intravenous
dose: 40 mg
route of administration: Intravenous
experiment type: MULTIPLE
co-administered:
ESOMEPRAZOLE plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
Doses

Doses

DosePopulationAdverse events​
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy, 45.2
Health Status: unhealthy
Age Group: 45.2
Sex: M+F
Sources:
Other AEs: Nausea, Diarrhoea...
Other AEs:
Nausea (7%)
Diarrhoea (6%)
Headache (3%)
Sources:
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Other AEs: Headache, Abdominal pain...
Other AEs:
Headache (6.9%)
Abdominal pain (5.2%)
Nausea (4%)
Diarrhea (3.7%)
Vomiting (3.2%)
Flatulence (2.7%)
Esophageal acid reflux (1.9%)
Upper respiratory infection (1.9%)
Constipation (1.5%)
Dizziness (1.5%)
Rash (1.5%)
Asthenia (1.3%)
Back pain (1.1%)
Cough (1.1%)
Sources:
AEs

AEs

AESignificanceDosePopulation
Headache 3%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy, 45.2
Health Status: unhealthy
Age Group: 45.2
Sex: M+F
Sources:
Diarrhoea 6%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy, 45.2
Health Status: unhealthy
Age Group: 45.2
Sex: M+F
Sources:
Nausea 7%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy, 45.2
Health Status: unhealthy
Age Group: 45.2
Sex: M+F
Sources:
Back pain 1.1%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Cough 1.1%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Asthenia 1.3%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Constipation 1.5%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Dizziness 1.5%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Rash 1.5%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Esophageal acid reflux 1.9%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Upper respiratory infection 1.9%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Flatulence 2.7%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Vomiting 3.2%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Diarrhea 3.7%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Nausea 4%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Abdominal pain 5.2%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
Headache 6.9%
20 mg 1 times / day multiple, oral
Recommended
Dose: 20 mg, 1 times / day
Route: oral
Route: multiple
Dose: 20 mg, 1 times / day
Sources:
unhealthy
OverviewDrug as perpetrator​

Drug as perpetrator​

TargetModalityActivityMetaboliteClinical evidence
strong [IC50 3.7 uM]
yes (co-administration study)
Comment: Esomeprazole administration resulted in a significant increase (1.67‐fold) in the AUC0–∞ of proguanil and a significant decrease (0.522‐fold) in that of cycloguanil
weak [IC50 >40 uM]
weak [IC50 >40 uM]
weak [IC50 >40 uM]
weak [IC50 >40 uM]
weak [IC50 >40 uM]
weak [IC50 >40 uM]
weak [Ki 150 uM]
weak (co-administration study)
Comment: Omeprazole exerts a concentration-dependent inhibition of CYP1A2 activity in man. However, even after single oral doses up to 80 mg, this effect is weak and without clinical relevance
weak [Ki 367.5 uM]
weak [Ki 745.1 uM]
yes [IC50 1.2 uM]
likely (co-administration study)
Comment: The frequency of delayed MTX elimination in patients administered esomeprazole was 71.4%
yes [IC50 15.7 uM]
yes [IC50 17.6 uM]
yes [IC50 17.7 uM]
yes [IC50 22 uM]
yes [IC50 4.32 uM]
yes [IC50 6.7 uM]
yes [IC50 6.8 uM]
yes [IC50 84.3 uM]
unlikely (co-administration study)
Comment: Coaministration with simvastatin acid unlikely results in DDIs
yes [Ki 7.1 uM]
yes (co-administration study)
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes (expression study)
Comment: livers of patients treated with omeprazole showed higher MRP3 protein expression
Drug as victim

Drug as victim

TargetModalityActivityMetaboliteClinical evidence
major
yes (co-administration study)
Comment: When voriconazole was given with omeprazole to healthy subjects, it significantly increased the steady-state Cmax and AUC0-24 of omeprazole, an average of 2 times and 4 times, respectively
major
yes (co-administration study)
Comment: Drugs known to induce CYP2C19 or CYP3A4 (such as rifampin) may lead to decreased omeprazole serum levels. In a cross-over study in 12 healthy male subjects, St John’s wort, an inducer of CYP3A4, decreased the systemic exposure of omeprazole in CYP2C19 poor metabolisers (Cmax and AUC decreased by 37.5% and 37.9%, respectively) and extensive metabolisers (Cmax and AUC decreased by 49.6% and 43.9%, respectively)
minor
minor
minor
no
yes
yes (co-administration study)
Comment: Drugs which induce CYP2C19 or CYP3A4 (such as St. John’s Wort or rifampin) can substantially decrease esomeprazole concentrations
yes
yes (pharmacogenomic study)
Comment: Drugs which induce CYP2C19 or CYP3A4 (such as St. John’s Wort or rifampin) can substantially decrease esomeprazole concentrations; The CYP2C19 isoenzyme exhibits polymorphism in the metabolism of esomeprazole, since some 3% of Caucasians and 15–20% of Asians lack CYP2C19 and are termed poor metabolizers. At steady state, the ratio of AUC in poor metabolizers to AUC in the rest of the population (normal metabolizers) is approximately 2
PubMed

PubMed

TitleDatePubMed
Affinities at the verapamil binding site of MDR1-encoded P-glycoprotein: drugs and analogs, stereoisomers and metabolites.
2000 Apr
The rates of common adverse events reported during treatment with proton pump inhibitors used in general practice in England: cohort studies.
2000 Oct
Hypercalcaemia and acute interstitial nephritis associated with omeprazole therapy.
2000 Sep
Pharmacokinetic study of esomeprazole in the elderly.
2001
Study of the electrospray ionization mass spectrometry of the proton pump inhibiting drug Omeprazole.
2001
Antireflux surgery in children suffering from reflux-associated respiratory disease?
2001 Apr
Pantoprazole and cyclosporine or tacrolimus.
2001 Apr
Maximal acid reflux control for Barrett's oesophagus: feasible and effective.
2001 Apr
Nitrofurantoin quadruple therapy for Helicobacter pylori infection: effect of metronidazole resistance.
2001 Apr
Complete remission of primary high-grade B-cell gastric lymphoma after cure of Helicobacter pylori infection.
2001 Apr 1
Protective effect of famotidine, omeprazole, and melatonin against acetylsalicylic acid-induced gastric damage in rats.
2001 Feb
Re: Ammonia cannot explain the effect of H. pylori on omeprazole-induced acid suppression.
2001 Feb
Do some patients with Helicobacter pylori infection benefit from an extension to 2 weeks of a proton pump inhibitor-based triple eradication therapy?
2001 Feb
Increased acid and bile reflux in Barrett's esophagus compared to reflux esophagitis, and effect of proton pump inhibitor therapy.
2001 Feb
Comparison of the efficacy and safety of different formulations of omeprazole-based triple therapies in the treatment of Helicobacter pylori-positive peptic ulcer.
2001 Feb
Continued (5-year) followup of a randomized clinical study comparing antireflux surgery and omeprazole in gastroesophageal reflux disease.
2001 Feb
Pharmacodynamic modeling of pantoprazole's irreversible effect on gastric acid secretion in humans and rats.
2001 Feb
Antibiotic-resistance patterns of Helicobacter pylori in Croatia: cohort study.
2001 Feb
Relaxation induced by omeprazole does not change in diabetic rabbit corpus cavernosum.
2001 Feb
CYP3A4 is the major CYP isoform mediating the in vitro hydroxylation and demethylation of flunitrazepam.
2001 Feb
Helicobacter pylori augments the acid inhibitory effect of omeprazole on parietal cells and gastric H(+)/K(+)-ATPase.
2001 Feb
Meta-analysis of randomized controlled trials comparing standard clinical doses of omeprazole and lansoprazole in erosive oesophagitis.
2001 Feb
Eradication of Helicobacter pylori prevents ulcer development in patients with ulcer-like functional dyspepsia.
2001 Feb
Analysis of gastrin receptor gene expression in proliferating cells in the neck zone of gastric fundic glands using laser capture microdissection.
2001 Feb 2
Management of GERD: medical versus surgical.
2001 Jan
Esomeprazole once daily for 6 months is effective therapy for maintaining healed erosive esophagitis and for controlling gastroesophageal reflux disease symptoms: a randomized, double-blind, placebo-controlled study of efficacy and safety.
2001 Jan
Does pantoprazole alleviate mouth dryness in patients with Sjögren's syndrome?
2001 Jan
Allergic contact dermatitis due to lansoprazole, a proton pump inhibitor.
2001 Jan
Long-term follow-up and serologic assessment after triple therapy with omeprazole or lansoprazole of Helicobacter-associated duodenal ulcer.
2001 Jan
Switching between intravenous and oral pantoprazole.
2001 Jan
Hypergastrinemia promotes adenoma progression in the APC(Min-/+) mouse model of familial adenomatous polyposis.
2001 Jan 15
Propylene glycol toxicosis in a llama.
2001 Jan 15
Current approaches to reducing gastrointestinal toxicity of low-dose aspirin.
2001 Jan 8
Helicobacter pylori and nonsteroidal anti-inflammatory drugs: interaction with proton pump inhibitor therapy for prevention of nonsteroidal anti-inflammatory drug ulcers and ulcer complications--future research needs.
2001 Jan 8
Clinical onset of the Crohn's disease after eradication therapy of Helicobacter pylori infection. Does Helicobacter pylori infection interact with natural history of inflammatory bowel diseases?
2001 Jan-Feb
Level of malondialdehyde after short-time omeprazole administration.
2001 Jan-Feb
Effect of polaprezinc on impaired healing of chronic gastric ulcers in adjuvant-induced arthritic rats--role of insulin-like growth factors (IGF)-1.
2001 Jan-Feb
The effect of culture results for Helicobacter pylori on the choice of treatment following failure of initial eradication.
2001 Mar
Electrochemical studies and differential pulse polarographic analysis of lansoprazole in pharmaceuticals.
2001 Mar
Efficacy and safety of esomeprazole compared with omeprazole in GERD patients with erosive esophagitis: a randomized controlled trial.
2001 Mar
Effect of genotypic differences in CYP2C19 on cure rates for Helicobacter pylori infection by triple therapy with a proton pump inhibitor, amoxicillin, and clarithromycin.
2001 Mar
Stereoselective pharmacokinetics of pantoprazole, a proton pump inhibitor, in extensive and poor metabolizers of S-mephenytoin.
2001 Mar
A case of gastric plasmacytoma associated with Helicobacter pylori infection: improvement of abnormal endoscopic and EUS findings after H. pylori eradication.
2001 Mar
Five-day proton pump inhibitor-based quadruple therapy regimen is more effective than 7-day triple therapy regimen for Helicobacter pylori infection.
2001 Mar
Clarithromycin vs. furazolidone in quadruple therapy regimens for the treatment of Helicobacter pylori in a population with a high metronidazole resistance rate.
2001 Mar
One-week ranitidine bismuth citrate-based triple therapy for the eradication of Helicobacter pylori in Hong Kong with high prevalence of metronidazole resistance.
2001 Mar
Esomeprazole 20 mg maintains symptom control in endoscopy-negative gastro-oesophageal reflux disease: a controlled trial of 'on-demand' therapy for 6 months.
2001 Mar
Improvement in atrophic gastritis and intestinal metaplasia in patients in whom Helicobacter pylori was eradicated.
2001 Mar 6
Haloperidol-stomach lesions attenuation by pentadecapeptide BPC 157, omeprazole, bromocriptine, but not atropine, lansoprazole, pantoprazole, ranitidine, cimetidine and misoprostol in mice.
2001 Mar 9
Microsatellite instability at D18S61 is associated with no regression of gastric mucosa-associated lymphoid tissue lymphoma after Helicobacter pylori eradication.
2001 Mar-Apr
Patents

Sample Use Guides

Active Duodenal Ulcer: 20 mg Once daily for 4 weeks. Some patients may require an addition 4 weeks. Gastric Ulcer: oral dose is 40 mg once daily for 4-8 weeks. Gastroesophageal Reflux Disease: The recommended adult oral dose for the treatment of patients with symptomatic GERD and no esophageal lesions is 20 mg daily for up to 4 weeks. The recommended adult oral dose for the treatment of patients with erosive esophagitis and accompanying symptoms due to GERD is 20 mg daily for 4 to 8 weeks.
Route of Administration: Oral
Pretreatment of omeprazole (10-6 - 10-4M) dose-dependently inhibits neutrophil adherence and respiratory burst induced by H. pylori. These evidences imply that omeprazole may exhibit a beneficial effect on H. pylori-associated gastric mucosal damage caused by activated neutrophils.
Substance Class Chemical
Created
by admin
on Wed Apr 02 10:38:37 GMT 2025
Edited
by admin
on Wed Apr 02 10:38:37 GMT 2025
Record UNII
ZVL67L3RDK
Record Status Validated (UNII)
Record Version
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Name Type Language
3,10-DIMETHOXY-2,4-DIMETHYL-5H-BENZO(4,5)IMIDAZO(1,2-B)PYRIDO(1,2-D)(1,2,4)THIADIAZIN-13-IUM
Systematic Name English
ESOMEPRAZOLE METABOLITE ACTIVE SULFENAMIDE
Preferred Name English
OMEPRAZOLE METABOLITE ACTIVE SULFENAMIDE
Common Name English
Code System Code Type Description
FDA UNII
ZVL67L3RDK
Created by admin on Wed Apr 02 10:38:37 GMT 2025 , Edited by admin on Wed Apr 02 10:38:37 GMT 2025
PRIMARY
PUBCHEM
13553714
Created by admin on Wed Apr 02 10:38:37 GMT 2025 , Edited by admin on Wed Apr 02 10:38:37 GMT 2025
PRIMARY
Related Record Type Details
PRODRUG -> METABOLITE ACTIVE
PRODRUG -> METABOLITE ACTIVE