Do not inj IV. Rise in serum thyroid hormone conc in patients who have substantial thyroid tissue still
in situ or functional thyroid cancer metastases. Post-marketing reports of stroke. Patients should be well-hydrated prior to treatment. Sudden, rapid & painful enlargement of residual thyroid tissue or distant metastases can occur following treatment. Consider pre-treatment w/ glucocorticoids for patients in whom tumor expansion may compromise vital anatomic structures. Risk associated w/ radioiodine treatment. Patients w/ renal impairment. Pregnancy & lactation. Safety & effectiveness in ped patients have not been established.