1. History of allergy to PI, NaClO2, CPC and its relevant excipients 2. All forms of thyroid disease or current radioactive iodine treatment 3. Lithium therapy 4. Known pregnancy 5. Renal failure

1. History of allergy to PI, NaClO2, CPC and its relevant excipients 2. All forms of thyroid disease or current radioactive iodine treatment 3. Lithium therapy 4. Known pregnancy 5. Renal failure