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My doctor's nurse said normalNormal saline flush thyroid range is between 0.3 and 5.1. My thyroid came back 7.2. I looked up those readings and I can't find those ranges listed anywhere. Are these ranges correctCorrect (new formula) and if so am I hypo or hyperHyper-sal? They are RXing synthroid is that suitable for my thyroid results?
They need to run a Free T4 test to confirm you need the medication.
A TSH above 5.1 indicates hypothyroidism. It's more complicated than that, but for the moment that answer will do.
They want to give you a drug that will give you additional T4. First they need to know that you are low on T4.
Without a Free T4 test, they are only guessing.
Hopefully they ran a Free T4, and you just haven't mentioned it yet.
They should now be running more tests to find out why you are hypothyroid.
Welcome to the site. If you have more questions, feel free to ask. There are lots of people here who can help you learn what you need to know.
What lab performed your tests?
This would indicate "subclinical" or "mild" hypothyroidism. It still deserves to be treated before it progresses further.
Thyroid antibodies would also be a good test to have done.
It would be better for the doctor to get a repeat TSH and free t4 before rx'ing meds.
Synthroid would be the appropriate medication.
What dose did you start on?