Re: thyroid tests and allergy to cytomel

August 5, 2012

Betty,

Some time ago I did some extensive on-line searching on absorption of

Liothyronine (e.g. Cytomel)and found very, very little by way of research.

Almost everywhere that gave interaction information (and identified their own

references) actually ended up taking known information about levothyroxine and

applying that to liothyronine. And many places did that without making it at all

clear. In the absence of any other information that does seem a reasonable first

guess but it certainly did not seem to have been researched properly.

Some people seem to take liothyronine and desiccated thyroid products with food

intentionally. It might slow down the release and absorption of the liothyronine

and make it a smoother experience. But doing so runs the risks of causing

reduced or variable absorption of actual thyroid hormones.

The advice about other medicines seems all too likely to be true even if it did

come from levothyroxine research. But I am only guessing.

Trust no-one on this issue without some proper references. Asking for real-life

experiences (as you did) is possibly the only real thing that matters - but take

huge pinches of salt with any replies you get,

Rod

>

> Lois,

> According to this RX site

> this medication by mouth with or without food, usually once daily in the

> morning or as directed by your doctor. " However further down in the

> article it speaks of interaction with some other drugs " Take this

> medication 4 hours before or after taking any products containing

> aluminum or iron, such as antacids, sucralfate, and vitamins/minerals.

> Take liothyronine 4 hours before or after taking cholestyramine or

> colestipol. These products react with liothyronine, preventing its full

> absorption. "

>

> Maybe someone with experience will confirm or deny this as it is in real

> life. Thinking back I'm sure I didn't take it on an empty stomach.

> Betty

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