Potassium Iodide (KI) Key Facts 5 Newborn infants (less than 1 month old) who receive more than one dose of KI are at particular risk for developing a condition known as hypothyroidism (thyroid hormone levels that are too low). If not treated, hypothyroidism can cause brain damage. Infants who receive KI should have their thyroid hormone levels checked and monitored by a doctor. Avoid repeat dosing of KI to newborns. Where can I get KI? KI is available without a prescription. You should talk to your pharmacist to get KI and for directions about how to take it correctly. Your pharmacist can sell you KI brands that have been approved by the FDA. Other Sources of Information * The FDA recommendations on KI can be reviewed on the Internet at Frequently Asked Questions on Potassium Iodide (KI) . * The Centers for Disease Control and Prevention's Emergency Response Site is available at CDC Radiation Emergencies. [4/9/2011 2:09:26 PM] David: Radiation Emergencies CDC has a key role in protecting the public's health in an emergency involving the release of radiation that could harm people's health. This site provides information to help people protect themselves during and after such an event. It also provides information for professionals involved in planning for and responding to this type of emergency.