I took Iodine yesterday after a full meal. I put 6 drops in a bottle of water and drank it over a two hour period. The reaction I got was like an adrenalin rush, plus I felt slightly ill in the tummy, but not bad. I felt pretty good, but thought there might be too much of a "rush", and after a while, I noticed that I felt jittery and uncomfortable. I'm prediabetic and I used to get jitters when I consumed too much sugar(something I do not do these days). The feeling started to get like that.
I've never been tested for thyroid problems, but I seem to have most of the early symptoms of hypothyroidism, except excessive weight.