That's a good question - the parameters surrounding Iodine RAI treatment.
Here's some more info I found in our Thyroid Health Pages --- Preparation, During and Right After, etc.
Precautions After RAI Scanning or Treatment
In addition to all the special preparations prior to an RAI scan or treatment, there are also precautions to follow afterwards. Although only a small amount of radioactivity is involved with this scan, it is still important to follow these simple precautions in order to minimize radiation exposure to your family members and friends. Since the radioactivity is excreted through all bodily fluids, mainly urine, as well as feces, sweat and saliva, it is essential to isolate these fluids. After you've had your I131 scan/treatment, you should: ......................
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