I have been taking Iodine since April 15, and am now up to 32 drops per day. I had only flu type symptoms about three weeks into it. An occasional headache, but basically no side effects.
I take mine only in water. I dilute it with a little water, chug it and chase with a big glass of water. It's all good. I find no difference in side effects at 32 drops as at 5-10 drops.