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How long does it take to clear synthroid from system

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Old 09-15-2009, 10:12 AM   #1
Join Date: Sep 2009
Location: Torrance, Ca., USA
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sblischke HB User
How long does it take to clear synthroid from system

How long does it take to clear synthroid from system

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Old 09-15-2009, 11:26 PM   #2
Join Date: Aug 2009
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fireweed HB User
Re: How long does it take to clear synthroid from system

I've been told three weeks.

Old 09-16-2009, 04:47 AM   #3
Join Date: Jul 2009
Location: USA
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Summer2928 HB User
Re: How long does it take to clear synthroid from system

I am not sure, but I read somewhere that half-life of thyroxine is 7 days, which means that if you take, say, 100 mcg every day over some period of time and stop, then:

in first 7 days - 50 mcg (=100\2) remains in your system
in next 7 days - 25 mcg (=50\2) remains,
in next 7 days - 12,5 mcg (=25\2)remains
and so on.

But it is not exactly correct, because thryoxine builds up in your tissues, and overall amount in your entire body - stored and circulating - is not 100 mcg, but .. (400 mcg?..) or so.

I read it somewhere when I was browsing Interent for something else, now I cannot find this place... I also would like to know, how you can judge that all your medication came out?

Last edited by Summer2928; 09-16-2009 at 05:16 AM.

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