Tachycardia after taking Lugol's

I used to have this alot when I was hypothyroid. My guess is that the Iodine triggered an underlying hypo T.
Also the adrenals have a say in this; I also had a very low tolerance to coffee back then.
(one cup after 5 pm and I could forget about sleeping much the following night)
What helped me before iodine, was salt ala the watercure.
And magnesium. Then ioine, selenium and the other co-supplements slowly corrected the hypo T.
Be careful with vit B late in the day too, it caused heavy palpitation at night in my case.

"Symptoms and Signs
Increased levels of thyroxine released from the thyroid gland stimulate the heart to beat more quickly and more strongly. Initially this may produce a fast heart rate which is called a tachycardia. This is observed by a nurse or physician but is usually not noticed by the patient. However, if the fast heart rate becomes severe then palpitations may be observed by the patient. This is an awareness of the heart beating within the chest. Occasionally it can be noticed by normal individuals and may be caused by excessive exercise or drinking too much caffeine. However, if it occurs at rest and is a fast prolonged heart rate, then it may be abnormal. "
http://www.thyroid.ca/e6a.php

What other supplements do / did you take?