Decision on thyroxine doses are not made purely on the basis of
TSH levels. Two most important factor in deciding the dose of thyroxine on your current symptoms and weight.
Kindly share you are complete history and since how long you are using thyroxine in the dose of 80 µg. That will be helpful in deciding your further dose.
Next Steps
For further clarification, complete evaluation, correct diagnosis and treatment and prescription feel free to consult me on this PRACTO APP. Stay safe and take care of yourself