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tigger67 · 08-31-2009, 07:11 AM

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.

http://www.csa.com/discoveryguides/thyroid/gloss.php

08-31-2009, 07:11 AM	#3
tigger67 Senior Veteran (female) Join Date: May 2005 Posts: 838	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. http://www.csa.com/discoveryguides/thyroid/gloss.php