Displaying 17 results of Methotrexate Stable Isotopes Methotrexate Stable Isotopes refer to the stable isotopes of the drug Methotrexate, a widely used chemotherapy drug. These stable isotopes are useful for conducting clinical trials and research studies, as they allow for accurate measurement and tracking of the drug's metabolism in the body. They also aid in the development of new formulations and dosage forms of the drug, potentially leading to more effective treatments for cancer and other diseases.