Thyroid in a newborn with High Bilirubin level

Hello Doctor,

The table given below is the Thyroid, Bilirubin test results of my 50days old new born son. He had a prolonged jaundice after his birth which had Bilirubin level over 13.5. The doctor suggested a Thyroid test to find the cause for prolonged jaundice after a month of his birth. Now he has confirmed that the TSH is the cause for this. He has given a prescription to my son. That is lthyroxine.

It would be very greatful if you can let me know if this prescription could help my son to have a normal life. Should he undergo any other tests. Will he be fine after a course of time. This is worrisome for myself, my wife and for my family. Will he have any complications in his growth. Should he take medicine for long. Please advice.

Thanks,
Antony


Thyroid Profile

Test                                                                         Result         Reference
Serum Tri-lodo Thyronine(T3)(CLIA)                         158ng/dl         87-178
Serum Thyroxine/T4 (CLIA):                                  6.2 µgm/dl 6.09-12.23
Serum Thyroid Stimulating Hormone – TSH(CLIA)         15.9 µlU/dl 0.34-5.6
Serum Free T4(CLIA):                                                   1.1ng/dl         0.58-1.64
      
Billirubin

Test                                        Result Reference
Bilirubin Total (Diazo)                8.3 mg/dl 0.2-1.1
Bilirubin Direct (Diazo)        0.6 mg/dl 0.2-0.6
Bilirubin (Indirect)                7.7 mg/dl 0.3-0.5