T3 OK, T4 OK, Very low TSH (Too high TSH before start of treatment & now too low)

[dkchamoli]

i was diagnosed with hypothyroidism in following tests
T3 77 (60-120).
T4 2.7 (4.5-12.5)
TSH 57.5 (0.3-5.5)
My Body weight is around 48 kg & I was advised on Thyroxine Sodium 75 mcg. Now after 3 months of taking the above medicine following levels were found
T3 - 120
T4 - 6.4
TSH  ≤ 0.01
25-OH VITAMIN D Total 15.22 ng/dl
I am worried about these low TSH levels. What should i do change of doctor, medicine or else. How much vitamin D supplement am i required to take for how long.

[goolarra]

Unfortunately, those tests are total T3 and total T4, rather than FREE T3 and FREE T4.  Perhaps you could ask your doctor for the frees next time.

No, you should not be worried about your low TSH, UNLESS you have hyper symptoms.  Once on meds, TSH often becomes totally unreliable.  Your T4 is only 24% of range, which is still considerably low of the 50% guideline.  Is the range on your T3 correct (20-120)?  TT3 reference range upper limit is usually considerably higher than that.  Any symptoms?

Many doctors will put their patients on 50,000 IU of D per week when they have a deficiency like yours.  Levels are then monitored and the dose is slowly decreased once the level comes up.  You should discuss this with your doctor or a dietician.  You won't know how long it will take; you have to keep monitoring it, so you will need help so you can get blood work.