Displaying 3 results of Naloxon Stable Isotopes Naloxone is a medication used to counteract the effects of opioids, such as respiratory depression and overdose. Stable isotopes of naloxone are isotopes that have the same number of protons and electrons as the regular form, but a different number of neutrons. These isotopes can be used in research studies to track the distribution and metabolism of naloxone in the body, and may also have potential as therapeutic agents.