My mother is 60 years old and she is taking eltroxin 75 mcg tablet since last two months when her
TSH level was 5.00 . Before that she was taking eltroxin 50 mcg since last ten years. She went for
thyroid test two days back and test report showing T3 is .90, T4 is 9.30 and TSH is 16.23. I am not able to understand how TSH level is increased so abnormally since she is taking medicine regularly. Thyroid test done at lal path lab please suggest me what I have to do now.