How long to re-test after T3 dose change on T4/... - Thyroid UK

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How long to re-test after T3 dose change on T4/T3 combo?

Hattie007 profile image
6 Replies

Hello all. So we say one should wait at the minimum, 6 weeks before a re-test of blood following a T4 dose change, but what about a change in T3 if the T4 dose stays the same. What's the minimum we must wait?

Many thanks in advance 😃

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Hattie007
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shaws profile image
shawsAdministrator

Rather than a blood test, I think I would go by how 'I feel' on a particular dose before testing.

Hattie007 profile image
Hattie007 in reply to shaws

Yes I hope I might be in that position soon but just feel I want a kind of second opinion as I feel like it's been so long since I felt well, I can't quite remember what is feels like! And then as I get to know my self a bit better again I can go off how I feel more in the future if that makes sense!

shaws profile image
shawsAdministrator in reply to Hattie007

Yes it does. Many of us have forgotten what it feels like to be symptom-free with no symptoms. :)

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Clutter profile image
Clutter

Hattie007,

Retest 6-8 weeks after any adjustment in dose or medication.

SeasideSusie profile image
SeasideSusieRemembering

I use a Levo/T3 combination and I wait 6 weeks after changing dose of T3 before retesting.

Hattie007 profile image
Hattie007

Ok. Thanks all.

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