My father is 76 years old and has hypothyroidism. He has been taking Thyronorm 25 mcg daily for more than a year. His recent blood test results are: T3: 90.55 ng/dL (normal range for above 50 yrs: 40 to 181 ng/dL) T4: 4.7 microgram/dL (normal range for above 60 yrs: 5 to 10.7 microgram/dL) TSH: 20.9 microIU/mL (normal range for 55 to 87 yrs: 0.5 to 8.9 microIU/mL) Should his dose be changed or kept the same? If it needs adjustment, what should the new dose be?

Answered by 1 Apollo Doctors

Dr Vasanthasree Nair

General Practitioner

MBBS
15+ Yrs

Consult Now

TSH is high and T4 low, suggests under treatment. His dose likely needs to be increased (under doctor guidance). Repeat thyroid profile in 6 to 8 weeks after dosage adjustment.

Dr. Vasanthasree Suggests...

Take a Thyroid Profile (T3 T4 TSH) Test Test

Book Thyroid Profile (T3 T4 TSH) Test Test

Answered 15/09/2025

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