The chemical Pefloxacin Mesylate Dihydrate has a designated molecular formula of C18H28FN3O8S and a molecular weight of 465.493 g/mol. Synonyms may include: UNII-CX28QC6FU0, Pefloxacin mesylate dihydrate, Pefloxacin mesylate dihydrate [EP], 1-Ethyl-6-fluoro-7-(4-methylpiperazin-1-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid methanesulfonate dihydrate, Peflacine, Peflox (ChemID). Pefloxacin Mesylate Dihydrate has been assigned a MeSH pharmacological action of: Antibacterial, Cytochrome P-450 CYP1A2 Inhibitor, Topoisomerase II Inhibitor.