Displaying 5 results of Fulvestrant Stable Isotopes Fulvestrant is a medication used to treat breast cancer. Stable isotopes of Fulvestrant are used in research and clinical studies to track the drug's metabolism and pharmacokinetics. These isotopes are non-radioactive and offer a safe and effective way to study the effects of Fulvestrant on the body. They are also used to develop new therapies and improve existing treatments for breast cancer.