Displaying 4 results of Metamizole Stable Isotopes Metamizole Stable Isotopes are a type of isotopic substance that do not undergo radioactive decay over time. These isotopes have the same number of protons and electrons as the naturally occurring element, but differ in the number of neutrons. Metamizole is an analgesic and antipyretic drug that has been used for over a century to treat pain and fever. Its stable isotopes can be used for various applications, including medical research and drug development.