A 35-year-old female asked:
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i am hypothyroid and on 150mcg/day levothyroxine. tsh was .53 two weeks ago. i am still cold, have low bp, high heart rate, depressed, and insomnia.

1 doctor answer
Dr. Tania Dempsey
24 years experience Internal Medicine
Need more lab tests: Tsh does not tell the whole story. Have your doctor check free T4 and free t3 (liothyronine). Those are your actual thyroid hormone levels and might more accurately reveal whether you are on enough medication or even the right medication. Levothyroxine is T4 and needs to be converted to t3 (liothyronine), so a low free T3 (liothyronine) means that you are not converting. Low T3 (liothyronine) can cause many of the symptoms you describe.
Answered on Jan 15, 2015
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