In 2005, I was treated with radioactive iodine for my hyperthyroidism, and it worked very well. I ended up becoming hypothyroid, or under active, and take thyroid meds daily now. Everything was fine. I would discuss radiation with your doctor. My brother was diagnosed with Grave’s before me, and had a horrible allergic reaction to the hyperthyroid meds so I chose to go the radiation route.
Good luck and let us know how you make out. Always remember–if you don’t like what your doctor is suggesting, and he/she won’t work with you, find someone else. Do your research!