I know that you must wait 6-8 weeks after an increase in t4 meds for the tsh to stabilize. But about how long after a t4 med increase will your t4 levels begin to rise?
How long for t4 to rise after a med increase? - Thyroid UK
How long for t4 to rise after a med increase?
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Eshep
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It's not really about your TSH - although doctors think it is! It's about giving that T4 time to convert into FT3 - although they rarely test it.
I don't know if anybody has ever done any research into how long it takes for T4 to rise, but I would imagine it would be a slow increase, given that you're taking it daily, and not all in one lump. Every day, it would get a little higher, I would imagine.
Thank you. It is good to know anyway what the reasoning behind the 6 week wait is.
I read that any dose increase gradually builds up in your body and it's tobdo with half life. So itstakes 6 weeks for the new dose to build up to its maximum in your body.
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