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Old 08-31-2009, 08:11 AM   #3
Senior Veteran
Join Date: May 2005
Posts: 838
tigger67 HB User
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.