I’m scheduled to have my radioactive iodine treatment after complete thyroidectomy in four weeks, and during this time and before RAI treatment I’m completely off any thyroid hormone medications. Two months ago I had a complete thyroidectomy after nodules they found were cancerous and now I have to undergo radioactive iodine treatment as well. I know that having to thyroid hormones in your body can make you tired and whatnot, but I’m having completely opposite problem – for five nights in a row I barely slept few hours. Is it possible that the lack of TSH hormone is causing insomnia, or am I just a very specific case?