Displaying 7 results of Chlormadinone Stable Isotopes Chlormadinone is a synthetic progestin used in hormone replacement therapy and as a contraceptive. Stable isotopes of chlormadinone, such as carbon-13 and deuterium, can be used in research to track the metabolism and pharmacokinetics of the drug. These isotopes can also be used to develop more accurate analytical methods for detecting and quantifying chlormadinone in biological samples.