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right way to test for thyroid function (TSH, T3, T4)

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Old 12-23-2009, 04:04 AM   #1
Join Date: Dec 2009
Location: Chennai, TN, India
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sajit216 HB User
Question right way to test for thyroid function (TSH, T3, T4)

I am suffering from hypothyroidism and am on thyroxine supplements which I have first thing in the morning. I get myself tested for thyroid functions frequently. While going for this test (which is in the morning), should I have my thyroxine before the test or wait for the test to be over, to have it.

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Old 12-23-2009, 08:24 AM   #2
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Accutane2X HB User
Re: right way to test for thyroid function (TSH, T3, T4)

That's a great question. Just started on Synthroid this morning and will have to have bloodwork done in a few weeks. I'm a newbie, so any advice would be helpful!

Old 12-23-2009, 09:30 AM   #3
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javelina HB Userjavelina HB Userjavelina HB User
Re: right way to test for thyroid function (TSH, T3, T4)

It's recommended you have your bloodwork before taking your thyroid meds in the am.
It's also recommended you have your free T3 and free T4 levels drawn to get a more accurate read on your hormone levels. Generally the free T levels need to be in the higher end of range before we feel symptom relief, and it's also very important to go by your symptoms during treatment. Relying on TSH during treatment is not a good idea as it can be very suppressed with good replacement therapy. Docs who try to keep your TSH in "normal" range may keep you very hypo as a result.

Last edited by javelina; 12-23-2009 at 09:30 AM.

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