Chemical formula: C₁₇H₁₉N₃O₃S  Molecular mass: 345.416 g/mol  PubChem compound: 4594

Active ingredient description

Omeprazole, a racemic mixture of two enantiomers reduces gastric acid secretion through a highly targeted mechanism of action. It is a specific inhibitor of the acid pump in the parietal cell. It is rapidly acting and provides control through reversible inhibition of gastric acid secretion with once daily dosing.

Medicine classification

This medicinal substance has been classified in the anatomical therapeutic chemical (ATC) classification according to its main therapeutic use as follows:

ATC code Group title Classification
A02BC01 Omeprazole A Alimentary tract and metabolism → A02 Drugs for acid related disorders → A02B DRUGS FOR PEPTIC ULCER AND GASTRO-OESOPHAGEAL REFLUX DISEASE (GORD) → A02BC Proton pump inhibitors
Discover more medicines within A02BC01

Product monographs

Competent medicine agencies globally have authorized commercialization of this active ingredient according to these medication package inserts (MPIs):

Title Information Source Document Type  
OMEPRAZOLE Gastro-resistant capsules Medicines & Healthcare Products Regulatory Agency (GB) MPI, EU: SmPC
OMEPRAZOLE Powder for solution for infusion Medicines & Healthcare Products Regulatory Agency (GB) MPI, EU: SmPC
PRILOSEC Granule for delayed-release oral suspension FDA, National Drug Code (US) MPI, US: SPL/PLR

Structural formula

Graphic representation of the active ingredient's molecular structure

3D molecular structure

3D representation of the active ingredient's molecular structure

External identifiers

CAS Substance: 73590-58-6
CAS Substance: 95510-70-6
DrugBank Drug: DB00338
KEGG Drug: D00455
PubChem Compound: 4594
RxNorm Ingredient: 7646
SNOMED-CT Concept: 387137007
Omeprazole (substance)
UNII Identifier: KG60484QX9


Omeprazole is an active ingredient of these brands:

United States (US)

Austria (AT)

Brazil (BR)

Canada (CA)

Ecuador (EC)

Estonia (EE)

Finland (FI)

France (FR)

Germany (DE)

Ireland (IE)

Israel (IL)

Japan (JP)

Lithuania (LT)

Malta (MT)

Mexico (MX)

Netherlands (NL)

New Zealand (NZ)

Tunisia (TN)

Turkey (TR)

United Kingdom (UK)

Note the following: The list of brand names is continuously updated, and thus does not include the total of products circulating worldwide.

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