how high should your TSH should be before starting to take thyroid medication
TSH is more sensitive than other thyroid tests because it begins to rise before thyroid hormones drop. As such, itâs a better indicator of early thyroid dysfunction. When the TSH test is âhigh normal,â in the range of 2.5-4.5, deciding to take thyroid medication can be a difficult decision.he first thing that indicates low thyroid is an elevated TSH level. A change from a low normal TSH to a high normal TSH over a period of a few months may mean early thyroid failure. If thyroid antibodies are positive or if the thyroid gland is enlarged the risk for thyroid failure is extremely high.