Why is a thyroid test performed when prescribed Maunzaro?

I am looking into the prescription for Maunza, and I am curious because I heard that a thyroid test is performed before the consultation.

I know that Maunzaro has precautions regarding the thyroid,

Do they perform tests to check thyroid function or the presence of thyroid disease before prescribing a prescription?

For those who have had thyroid tests, which items were tested,

Does the prescription for Maunza vary depending on the test results?