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In some countries, this medicine may only be approved for veterinary use.

In the US, Omeprazole (omeprazole systemic) is a member of the drug class proton pump inhibitors and is used to treat Barrett's Esophagus, Duodenal Ulcer, Erosive Esophagitis, Gastritis/Duodenitis, GERD, Helicobacter Pylori Infection, Hiatal Hernia, Indigestion, Laryngopharyngeal Reflux, Multiple Endocrine Adenomas, Stomach Ulcer, Systemic Mastocytosis and Zollinger-Ellison Syndrome.

US matches:

UK matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Gastric acid secretion inhibitor

Treatment of peptic ulcer and gastro-oesophageal reflux disease (GORD)

Proton pump inhibitor (PPI)

Chemical Name

1H-Benzimidazole, 5-metoxy-2-[[(4-metoxy-3,5-dimetyl-2-pyridinyl)metyl]sulfinyl]-

Foreign Names

Generic Names

  • Omeprazole (OS: JAN, USAN, BAN)
  • Oméprazole (OS: DCF)
  • H 168/68 (Astra) (IS)
  • Omeprazol (PH: Ph. Eur. 9)
  • Omeprazole (PH: BP 2018, JP XVII, Ph. Eur. 9, USP 41)
  • Oméprazole (PH: Ph. Eur. 9)
  • Omeprazolum (PH: Ph. Eur. 9)
  • Omeprazole Magnesium (OS: USAN, BANM)
  • H 168/68 magnesium (AstraZeneca) (IS)
  • Omeprazol hemimagnesium (IS)
  • Oméprazole magnésique (PH: Ph. Eur. 9)
  • Omeprazole magnesium (PH: Ph. Eur. 9)
  • Omeprazole Magnesium (PH: BP 2018, USP 41)
  • Omeprazol-Magnesium (PH: Ph. Eur. 9)
  • Omeprazolum magnesicum (PH: Ph. Eur. 9)
  • Omeprazole Sodium (OS: BANM, USAN, JAN)
  • H 168/68 sodium (Astra) (IS)
  • Oméprazole sodique (PH: Ph. Eur. 9)
  • Omeprazole Sodium (PH: BP 2018)
  • Omeprazole sodium (PH: Ph. Eur. 9)
  • Omeprazol-Natrium (PH: Ph. Eur. 9)
  • Omeprazolum natricum (PH: Ph. Eur. 9)

Brand Names


BANBritish Approved Name
BANMBritish Approved Name (Modified)
DCFDénomination Commune Française
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name

Further information on drug naming conventions: International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.