My lab results and high free thyroxin index

[rashel8362]

about 1 year ago found out that i had Hyperthyroidism... and taked methymazile for about six month.i don’t take any drug after that.
I had a blood test 1 week ago.. And was wondered that my free thyroxin index has suddenly raised up.
I would like some help with the results:

T4 Total - 9, range 4.5 - 12.0
T3 -1.5 range 0/7-2
T3 Uptake 25, range 25.0 - 35.0
(Free Thyroxin. Index) 6.2, range 1.1 - 4.4 ---- high
TSH 2.8, range 0.34 - 5.60


Why is the reason of high free thyroxin index while others are normal ?
Would you help me in this issue.

Thanking you in advance

[rashel8362]

thanks for your answer.
my symptoms are better than before.
but if i am still hyperthroid why my TSH is normal?

[Smilerdeb]

You need to ask for FREE T4 and FREE T3 to be done.
The normal T's are not good enough with hyperthyroidism and the most important hormone with hyper is FT3.

Your TSH could come DOWN a fraction but that depends on whether you are having any symptoms.