How much does ft4 usually increase?

[Beenies]

How much does ft4 usually increase if you increase your dose of levothyroxine by 25mcg?

Could you please tell me your experience?

[greygoose]

Sorry, could you correct your post, please? It doesn't make a lot of sense. Who is Ann?

If you are asking by how much 25 mcg is likely to raise the FT4, the answer is : not a lot. But, that does depend if that is your dose, or if that is just and increase.

[helvella Administrator Thyroid UK in reply to greygoose]

I too am confused.

This is a link to instructions on how to edit your own posts:

support.healthunlocked.com/...

[Beenies in reply to greygoose]

Sorry, used my phone and sometimes it goes haywire...

[greygoose in reply to Beenies]

OK...

[Beenies in reply to greygoose]

"But, that does depend if that is your dose, or if that is just and increase."

How does it matter? Is it smaller and smaller changes in ft4 the closer to your optional dose or the other way around?

[greygoose in reply to Beenies]

What I meant is, if your doctor puts you on a starter dose of 25 mcg, it's probably not going to make much difference at all. But, if your FT4 is up near the top of the range, then 25 mcg might be all you need to optimise your FT4. It will still be only a small rise, but all things are relative.

How big a rise depends on the person, I think. I don't think there's been any research on the subject, so I can't give you absolute figures. It also depends on how much of that 25 mcg you can absorb. I don't think anyone ever absorbs their entire dose.

[Beenies in reply to greygoose]

Ok, thanks. Do you know if it's likely for ft4 to rise from 15.4 to 19.8 on 25mcg extra?

[greygoose in reply to Beenies]

I find that rather doubtful. But, you never know, that's the problem. You just have to try it and see. If it goes too high, you can always cut the pill in half, or take the extra 25 on alternate days.