Displaying 2 results of Norfloxacin Stable Isotopes Norfloxacin is a synthetic broad-spectrum antibiotic commonly used to treat urinary tract infections and other bacterial infections. Norfloxacin Stable Isotopes are isotopically labeled forms of the drug that are chemically identical to the regular compound, but have a unique isotopic composition. These isotopes are used in pharmacokinetic and metabolic studies to track the drug's behavior in the body and to determine its efficacy and safety.