High dosage: Hi thanks for add I was born... - Thyroid UK

Thyroid UK

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High dosage


Hi thanks for add I was born without a thyroid gland and have been on thyroxine since im now in my middle sixtys 3years ago gp put my dosage to 200 micrograms gp has retired but I had to have blood test which has been acouple of years since I had one it was reading to high so another gp is monotoring my dosage gradually im now on 150 mon to fri and 125 sat and sunday been tired at times weight creeping up even though im with weightwatchers now maintaing trying too I was fine on 200 im also taking tamoxifen I dont understand t3s or t4s could someone explain this please

5 Replies

Hi bre65, welcome to the forum. :)

First things first: do you have copies of your blood test results? If so, post them here, with the ranges, and then we'll know what we're talking about. We need to know exactly what was tested, and exactly what the results were.

If you don't have copies, ask for them at the surgery. If you live in the UK, it is your legal right to have copies of YOUR results.

It could be that, although you were on quite a high dose of levo, you weren't converting it very well, so although your FT4 was high, your FT3 in now low. We'll be able to explain better when we see the numbers. :)

bre65 in reply to greygoose

Thank you for reply yes I will ask for last results got another test to do 15th may

greygoose in reply to bre65

You're welcome. :)

T4 is effectively inert, it's converted in the body to T3 which is the active hormone. Some people, myself included, cannot properly convert the T4 into T3 so are prescribed liothyronine. Ask your GP for the TSH results and you should be aiming for 1.0 or below, and perhaps ask for a referral to an endocrinologist.

Thank you for reply

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