Should Eltroxin be taken before or after a TSH test?
It will not affect TSH values. You can do it any time.
Hi Mr XXXX,
Welcome to HCM. I have gone through the question and understand your concerns.
In thyroid function test we do either TSH alone or T4 and TSH together. TSH values will be the same whether you take Eltroxin or not. But if you take Eltroxin, T4 will be slightly high. So it is recommended to do the test before Eltroxin dose or 4 hours after Eltroxin dose.
Hope I have answered your questions. If you have any further queries I will be happy to help you.
Dr Ajish TP [MD,DM]
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