Normal range of Free T4 and TSH

[TSH_FREET4]

Hi:
My son diagnosed with Hypothyriodism at birth, taking thyroid medication and he is turns 3.
Recently dr. run a test run
Free T4 : 1.6 and TSH 6.6
Is is reading normal? does doesage level needs to be increased? Current dosage is 25mcg levoxil

Pls. provide any suggestion.
Thanks

[Barb135]

The TSH reading is high (normal range is 0.3-3.0) and if used alone, would indicate hypo; however, the FT4 would depend on the reference range used by the lab, which as magpieannie said should be on the lab report.  

What about FT3?  Does that get run?  If not, it would be a good idea to ask for it next time as that is the main thyroid hormone that the body uses and that, along with the FT4 will give a much better indication.

[magpieannie]

What are the reference ranges that the lab uses? (Should be next to the actual lab result on your sons lab sheet.) Does your son have a thyroid gland? Do you see a pediatric endochronologist? Is he feeling good, or is having hypothyroid symptoms? (ex; fatigue, tired, crying, moody, constipated, cold, achy, weight gain, bloated) these are just a few of the symptoms that my daughter has had when she was left hypothyroid for many years by her pediatric endochronologist.She was born  without a gland in 2000. TSH should not be that high in my opinion.