Re: hot thyroid nodule treatment
Here is the URL to a recent study that looked at the risks and safety of long-term methimazole vs. radioiodine treatment. Your doctor either isn't being honest about the risks or he's just mistaken. You would probably be easily able to find other studies that confirm this one.
RAI treatment is very likely to cause hypothyroidism in your future. At that point, you'll be dependent on some MD's misinformed idea of proper treatment that will allow you to have the right type and amount of supplemental thyroid hormone for your needs. I wouldn't risk that unless there were no other options.