Factors Affecting Timing of Hypothyroidism Following Radioactive Iodine Therapy Patients With Graves Disease

All the patient need to stop ATD and iodine-containing drugs for 5 days prior to RAI treatment, and followed a low-iodine diet for 2 weeks. After fasting and water deprivation for 8 h, all the patients took RAI orally in the morning. After taking RAI, the patients need to continue fasting and water deprivation for extra 2 h to avoid the effects of food on iodine absorption.