Scenario 3   (Instructions) 4) This patient, and many of the others standing in the ambulatory lines for radiological screening and/or decontamination, are requesting potassium iodide (KI) administration. KI is most beneficial when: Administered to patients over the age of 50. Used specifically to treat victims contaminated by a RDD explosion. Contraindications such as pregnancy are considered. Administered to patients with thyroid disease. None of the above.