my tsh and t3 level is normal but t4 level is quite high. what does it signify?

Hi Anon,

Thank you for reaching out to the EmpowHER community to find answers about your TSH results. 

Your thyroid gland, which is located under the Adam’s apple area of your neck, produces two hormones. One of those hormones is called thyroxine (T4). Thyroxine is an iodine secreting hormone which regulates your metabolism.

In some women an increase of the hormone T4 may exist, which would represent hyperthyroidism. What was your level Anon? According to the National Institutes of Health (NIH), ʺA typical normal range is 4.5 to 11.2 micrograms per deciliter (mcg/dL).ʺ 

Also, the NIH states the following drugs may decrease T4 measurements:

• Interferon alpha
• Propranolol
• Anabolic steroids
• Phenytoin
• Androgens
• Lithium
• Antithyroid drugs (for example, propylthiouracil and methimazole)
• Interleukin-2

Anon, there is a lot of valuable information on the EmpowHER site about high t4 levels and hyperthyroidism. I am confident that you will find some great info. Here's a link to one of those articles.   https://www.empowher.com/media/reference/reducing-your-risk-hyperthyroidism

Here's some more info on the testing and common terms https://www.empowher.com/hypothyroidism/content/t3-t4-and-tsh-all-important-thyroid-function

Does this help?

Best,

Kristin