I have under active thyroid hashimotos
Now had bloods done on 125gm thyroxin they want to reduce it I told them to leave alone
FT3 Serum free triiodothyronine level 5.1 pmol/L [2.4 - 6.0]Free Thyroxine Serum free T4 level 23.5 pmol/L [9.0 - 19.1]Above high reference limit
Serum TSH level < 0.01 mu/L [0.35 - 4.94]Below low reference limit
What’s you view
Most important question……how do you feel
Was test done early morning, ideally just before 9am and last dose levothyroxine 24 hours before test
Ft3 is not over range
Do you always get same brand levothyroxine at each prescription
Essential to test vitamin D, folate, ferritin and B12 at least once a year
What vitamin supplements are you currently taking
What were most recent vitamin results
Are you on strictly gluten free diet or dairy free diet
Vitamin D
Serum total 25-hydroxy vitamin D level 73 nmol/L [50.0 - 120.0]
Comment Adequate levels of Vitamin D ( 25 OH Vitamin D 50 to
120 nmol/L ) Not always the same brand. Feel okay feel grumpy at times but I put that down to the teripartide injection I have for bones had test done 2pm
Suggest you get folate, ferritin and B12 levels tested
Are you taking magnesium or vitamin K2?
JAN86
FT4: 23.5 (9-19.1) = 143.56% of range
FT3: 5.1 (2.4-6.0) = 75% of range
When did you take your last dose of Levo before this test? Last dose should be 24 hours before to avoid a false high (if Levo taken before test) or false low result (if Levo taken longer than 24 hours before).
Do you take biotin or B Complex or any supplement containing Biotin (B7), if so did you leave it off for 3-7 days before test?
Providing that you left 24 hours between Levo and test, and no biotin then it would seem that you need a very high over range FT4 to produce a reasonable FT3 level.
4 years ago you posted results and the response was that your conversion was poor and to consider adding T3 to a lower dose of Levo:
healthunlocked.com/thyroidu...
I think it would be a good idea to seriously consider that suggestion 
No I don’t take-biotin. Took my meds at 7
So you didn't leave 24 hours between last dose of Levo and blood test, in that case you have a false high FT4 level and your conversion is not as bad as those results suggest.
Blood test results 
Thyroid Function test
How quickly do thyroid levels change
