The chemical Ondansetron hydrochloride has a designated molecular formula of C18H24ClN3O3 and a molecular weight of 365.858 g/mol. Synonyms may include: GR 38032F, SN 307, 9-Methyl-3-((2-methyl-1H-imidazol-1-yl)methyl)-4H-carbazol-4-one monohydrochloride, Zofran, Zofran ODT, Zophren, Zudan, NSC 665799, Ondansetron hydrochloride and dextrose in plastic container, Ondansetron hydrochloride and sodium chloride in plastic container (ChemID). Ondansetron hydrochloride has been assigned a MeSH pharmacological action of: Serotonin Antagonist.