Recent terrorist events have many people concerned about potential future attacks using radioactive materials. Taking potassium iodide (KI) tablets after an incident involving radioactive materials may or may not limit the risk of damage to a person's thyroid gland from ionizing radiation. The Centers for Disease Control and Prevention (CDC) has prepared this fact sheet to further explain when KI might be appropriate and what people should consider before making a decision to take KI. Topics include when to take KI, forms of KI and dosages, where to obtain KI, and medical conditions that make KI dangerous. The fact sheet also provides other sources of information, such as the Environmental Protection Agency's website and the U.S. National Response Team's website.
CDC Emergency Preparedness and Response: http://www.bt.cdc.gov/