Any radioactive iodine that is not taken up directly by the thyroid will be passed through the urine. Be sure to follow your doctor's
instructions. This may include:
- Do not eat any solid foods for at least 2 hours after treatment. Drink a lot of clear liquids, such as water or juice.
- For the first 8-12 hours following treatment, use the bathroom every hour. This will help flush the excess iodine from your body.
- Limit your contact with others. Do not enter a room with any infants or children. Stay at least 3 feet away from other adults. Do not stay near any other adult for more than a few minutes. Do not share a bed with anyone for 48 hours following the treatment.
- Do not share any food, drink, or dishes with anyone for the first week. Do not allow your saliva to come into contact with anyone. Avoid kissing and sexual contact.
- Flush the toilet twice after use.
- Wash hands often and thoroughly.
- Resume normal thyroid medications 48 hours after the treatment.
The majority of people who undergo the treatment for hyperthyroidism will have their thyroid levels return to normal within 8-12 weeks. However, in a small number of people, a second dose of radioactive iodine treatment is needed.
A follow-up visit with your doctor will be scheduled 4-6 weeks after treatment. Radioactive active iodine treatment can cause
(low thyroid function). This can occur at any time after treatment. It may be temporary or permanent. Your doctor will need to check your thyroid status every few months until levels are stable.