Displaying 3 results of Capecitabine Stable Isotopes Capecitabine is an orally-administered chemotherapy drug used in the treatment of breast and colorectal cancers. The stable isotopes of Capecitabine are used in research applications to aid in the development of new cancer therapies and to better understand the pharmacokinetics of the drug. The isotopes have identical chemical and physical properties to the standard drug, allowing for accurate and reliable experimentation without altering the therapeutic properties of the drug.