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In the US, Famotidine (famotidine systemic) is a member of the drug class H2 antagonists and is used to treat Allergic Urticaria, Cutaneous Mastocytosis, Duodenal Ulcer, Duodenal Ulcer Prophylaxis, Erosive Esophagitis, GERD, Hiatal Hernia, Indigestion, Laryngopharyngeal Reflux, Pathological Hypersecretory Conditions, Peptic Ulcer, Stomach Ulcer, Upper GI Hemorrhage, Urticaria 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

Histamine H₂-receptor antagonist

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

Chemical Name

Propanimidamide, 3-[[[2-[(aminoiminometyl)amino]-4-tiazolyl]metyl]tio]-N-(aminosulfonyl)-

Foreign Names

  • Famotidinum (Latin)
  • Famotidin (German)
  • Famotidine (French)
  • Famotidina (Spanish)

Generic Names

  • Famotidina (OS: DCIT)
  • Famotidine (OS: BAN, USAN, DCF, JAN)
  • L 643341 (IS)
  • MK 208 (IS: MerckSharpD)
  • YM 11170 (IS: Yamanouchi)
  • Famotidin (PH: Ph. Eur. 8)
  • Famotidine (PH: BP 2016, JP XVI, Ph. Eur. 8, USP 38)
  • Famotidinum (PH: Ph. Eur. 8)

Brand Names


BANBritish Approved Name
DCFDénomination Commune Française
DCITDenominazione Comune Italiana
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.