The Nuclear Regulatory Commission (NRC), which regulates the medical use of radioactive materials, recently updated guidance for materials licensees with respect to the administration of radioisotopes. In an Up & Atom blog post, our lawyers address two recent NRC Information Notices on medical events involving overexposure to strontium-82/rubidium-82 generator elution and the administration of YU-90 microspheres, and discuss the NRC’s recommendations to prevent their reoccurrence.