Displaying 6 results of Cyproterone Stable Isotopes Cyproterone is a synthetic progestogen and antiandrogen drug used in the treatment of a variety of conditions such as prostate cancer, hirsutism, and acne. Stable isotopes of cyproterone are non-radioactive isotopes that have the same chemical properties as the naturally occurring element but differ in their atomic mass. These isotopes are used in research studies to track and analyze the metabolic pathways of cyproterone in the body.