Hi, I was diagnosed with an overactive thyroid 2 months ago. I was prescribed Carbimazole which I had a bad allergic reaction too and ended up in hospital. I was then switched too Propylthiouracil which seems to be working well. Had my first Endocrinology appointment today and have been advised too have the radioactive Iodine treatment, which is exactly what I didn't want. Has anybody had this treatment? And can anyone give me advice, I'm still in shock as did not know how serious my condition was! Many thanks Teresa.