Displaying 5 results of Revefenacin Stable Isotopes Revefenacin stable isotopes are non-radioactive versions of the chemical element used in medical research and drug development. These isotopes have the same number of protons and electrons as the naturally occurring element, but a different number of neutrons. They are useful in studying the properties and behavior of revefenacin, a medication used to treat chronic obstructive pulmonary disease (COPD). The stable isotopes can be used to track the drug's absorption, distribution, metabolism, and excretion in the body.