Displaying 6 results of Toremifene Stable Isotopes Toremifene Stable Isotopes are a collection of isotopically labeled compounds used in drug metabolism studies and clinical trials. Toremifene, a selective estrogen receptor modulator (SERM), is used as a treatment for breast cancer. The stable isotopes of toremifene are used to track the metabolism and pharmacokinetics of the drug in vivo, aiding in drug development and clinical research.