Re: Could synthroid be making me dizzy?
I looked up the definition of Levothyroxine (T4) and it does contain iodine.
Levothyroxine (T4): The relatively inactive form of thyroid hormone, with four iodine atoms. It is converted by body tissues to T3 (triiodothyronine) when needed. It makes up 80% of the thyroid hormone released by the thyroid.