Displaying 3 results of Ketotifen Stable Isotopes Ketotifen is a medication used to treat allergies and asthma. It works by blocking histamine and other inflammatory substances in the body. Ketotifen Stable Isotopes are isotopes of ketotifen that have a stable atomic nucleus and do not undergo radioactive decay. These isotopes can be used in research and clinical studies to track the metabolism and pharmacokinetics of ketotifen in the body.