Displaying 5 results of Selegiline Stable Isotopes Selegiline is a selective inhibitor of monoamine oxidase B (MAO-B) that is used in the treatment of Parkinson's disease and depression. The stable isotopes of Selegiline are isotopically labelled versions of the drug that are used in research and development, such as for pharmacokinetic studies. These isotopes have the same chemical and physical properties as the non-labelled drug, but have a unique isotopic signature that allows for their detection and quantification in biological samples.