I had my Thyroid Gland removed on 24th August and it has just been confirmed that two out of three growths were malignant. I have been referred to The Nuclear Department at my local Hospital and I wonder if someone could answer a couple of questions for me. After surgery, I was prescribed 100 mg Levothyroxine daily. Will I have to come off the Levothyroxine before I have my R.A.I treatment? I am presuming, if I do have to come off Levothyroxine, that I can expect to feel very fatigued beforehand ? My second question is what to expect when I have the RAI treatment in terms of it being unpleasant, side effects etc. Many thanks.