An error in administering a diagnostic radiopharmaceutical drug or therapeutic drug may be a Nuclear Regulatory C reportable event called a “medical event.” The complete language for a medical event can be found under the NRC regulation 10 CFR 35.3045.

To ensure errors are properly reviewed, contact health physics promptly when it is discovered that:

• A diagnostic radiopharmaceutical drug was not administered within +/- 20% of the prescribed dose
• A therapy radiopharmaceutical drug was not administered within +/- 10% of the prescribed dose on the written directive

Additionally, a Stanford Alert for Event (SAFE) should be completed documenting the event.