Displaying 3 results of Nirmatrelvir Stable Isotopes Nirmatrelvir is a medication that is used to treat COVID-19. It is a protease inhibitor that works by blocking the replication of the virus. Nirmatrelvir stable isotopes are the non-radioactive forms of the drug that are used in research and development. These stable isotopes are important for studying the pharmacokinetics and pharmacodynamics of the drug, as well as for developing new formulations and dosages.