Worried about dropping Y4

[Apodemus]

I did a medicheck test for vitamins but it included a thyroid too and worried my T4 is dropping quickly from two weeks ago. Am I worrying about nothing? Next appt i. 2 weeks

13/03/2024 hospital appt

0.01 (L)

0.27 - 4.2 mIU/L

Final

•

Free Thyroxine (T4)

13/03/2024

15.1

12 - 22 pmol/L

To this week medicheck

T4 14.3 range 12-22

TSh 0.018 range 0.27 - 4.2

I'm on 5mg Carbimazole Graves with TED.

Thks

[PurpleNails Administrator]

Your FT3 was high, has that reduced? FT4 of 15.1 to 14.3 is not a hugely worrying drop. You expect some variation on each test.

Your TSH has also gone from suppressed (<0.01) to 0.018 which is detectable - which is good.

Your levels are still adjusting from when you were on a higher dose. The drop will lessen, & could start to rise. It takes at least 6 weeks for a new dose to find its new level.

[Apodemus in reply to PurpleNails]

Thank you PurpleNails! My T3 has gone from 6.1 to 5.4 ( 3.1-6.8).