Hi,
Thanks for your question.
Radioactive iodine is a permanent and more reliable cure for
hyperthyroidism.
This method treats hyperthyroidism.
Depending upon dose ,radio active iodine can destroy total or some part of the thyroid.
Radioactive iodine is available in an oral pill, so you won't need to be hospitalized. After you take the pill, your doctor will recommend drinking lots of fluids to prompt the release of the radioactive iodine through your urine.
Radioactive iodine only affects your thyroid gland. Thyroid cells are the main cells in the body that can absorb iodine, so there is very little
radiation exposure to the rest of your body's cells. When the thyroid cells absorb the radiation, they are damaged or destroyed.
Other alternative ways are Anti thyroid medications and surgery.
Since she has beem taking antithyroid medications,i would suggest you may go ahead with the stand in doctor's advice.
Hope I answered your question.If you have any questions I will be happy to help you.
Thank you.