Not sure about the throat thing and surely it's best to stop not knowing.
These are the types of questions I have for a real chemist like; is it possible for pure elemental Iodine to become contaminated? How strong is the bond between the alcohol and the Iodine in solution? What are the advantages/disadvantages of making a Lugols type solution with the elemental dissolved in alcohol first? Why does the alcohol base give it an energizing effect yet without symptoms of detox? Is elemental delivered by alcohol equally effective for all the other health reasons we take Iodine for? Also Wombat posted an x-ray picture of a rat once showing where the radioactive marked iodine settled in the rat's body, I would like to see this same rat pic done first with water carried iodine then with alcohol carried iodine. My best theory is based upon the way alcohol goes straight to the head and somehow this affects brain function from the iodine brain bath?
I think it makes a big difference in how iodine is delivered as to where it goes in the body and its bio-availability. I have more questions than answers and it is possible that not all the answers even exist.