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Sodium Iodide I 123 Capsules


Administration of Sodium Iodide I-123 Capsules is indicated as an oral diagnostic procedure to be used in evaluating thyroid function and/or morphology.



  • Females of childbearing age and pediatric patients should not be studied unless the benefits anticipated from the performance of the test outweigh the possible risk of exposure to the amount of ionizing radiation associated with the test.
  • Do not use after the expiration time and date stated on the label.
  • The prescribed Sodium Iodide I-123 dose should be administered as soon as practical from the time of receipt of product (i.e., as close to calibration time as possible), in order to minimize the fraction of radiation exposure due to the relative increase of radionuclidic contaminants with time.
  • Sodium Iodide I-123 capsules are radioactive and must be handled with care and appropriate safety measures, including adequate shielding of the preparation, should be used to minimize radiation exposure to clinical personnel and the patient consistent with proper patient management.
  • Radiopharmaceuticals should be used only by physicians who are qualified by training and experience in the safe use and handling of radionuclides, and whose experience and training have been approved by the appropriate government agency authorized to license the use of radionuclides.


  • Serious adverse reactions may include chest pain, tachycardia, rash and hives.
  • Other adverse reactions, although rare, include nausea, vomiting and itching skin.


  • Breast feeding: I-123 is excreted in human milk.  Bottle feedings should be substituted for breast feedings if the agent must be administered to the mother during lactation.
  • Safety and effectiveness in pediatric patients have not been established.

How Supplied

Distribution Direct
Calibration Day 12 noon CST - Monday through Thursday each week
Shelf Life 30 hours post calibration
Storage Conditions Controlled room temperature 20° to 25°C (68° to 77°F)

Order Information

Description Qty Unit Size Order # 11 Digit NDC
Vial, capsule 1 each 100 uCi N60110 00019960110
Vial, capsule 1 each 200 uCi N60220 00019960220


What is the calibration date and time for sodium iodide I-123?The product is calibrated for noon CT on Monday, Tuesday, Wednesday and Thursday.
What is the half-life? Iodine-123 decays by electron capture with a physical half-life of 13.2 hours. See package insert for more details.
What is the recommended dose?See package insert for dosing information.
Who do I contact for additional safety or usage questions?Call Mallinckrodt Product Monitoring at 800.778.7898.