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Why Do Thyroid Medicines Increase Breast Tenderness And Size?
I was diagnosed with hypothyroidism earlier this year (late last year). I have been on three different types of thyroid medicine because the first two made my breasts so painful and increase in size, along with weight gain. Now, the third medicine (levoxyl) is doing the same thing (within a week, my breasts hurt all the time and gained a full cup size). Is this common? Why do thyroid medicines increase breast tenderness and size?
posted on
Thu, 13 Mar 2014
Medically reviewed by
Ask A Doctor - 24x7 Medical Review Team
Sun, 31 Mar 2019
Answered on
Mon, 1 Apr 2019
Last reviewed on
Hello,
The breast tenderness you reported is not related to levothyroxine. It is due to high estrogen. You should check estradiol and prolactin level.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Mirjeta Guni, Endocrinologist
The breast tenderness you reported is not related to levothyroxine. It is due to high estrogen. You should check estradiol and prolactin level.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Mirjeta Guni, Endocrinologist
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