The chemical Famotidine has a designated molecular formula of C8H15N7O2S3 and a molecular weight of 337.435 g/mol. Synonyms may include: 3-(((2-((Aminoiminomethyl)amino)-4-thiazolyl)methyl)thio)-N-(aminosulfonyl)propanimidamide, 3-(((2-((Diaminomethylene)amino)-4-thiazolyl)methyl)thio)-N(sup 2)-sulfamoylpropionamidine, Dispronil, Famodil, Famosan, Famotidina [Spanish], Famotidinum [Latin], Famoxal, Fanosin, Fibonel, Ganor, Gaster (ChemID). Famotidine has been assigned a MeSH pharmacological action of: Histamine H2 Antagonist.