Take potassium iodide tablets only when Public Health officials tell you. In a Radiation Emergency, radioactive iodine could be released into the air. Potassium iodide can help protect you. If you are told to take this drug, take it one time every 24 hours. Do not take it more often. More will not help you and may increase the risk of side effects. You will likely be told not to take the drug for more than 10 days... Full Text