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Thyroid Disorders Message Board

  • Levothyroxine and ST. John's Wart

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    Old 10-17-2007, 10:51 AM   #1
    Join Date: Sep 2005
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    beththemom HB User
    Levothyroxine and ST. John's Wart

    I have been on thyroid meds for 10 years (fluctuating dosages throughout), I now have a lot of perimenopause symptoms and would like to take ST. John's
    wart for mild depression, but I wonder if it will interfer with my meds?
    Anyone taking ST. John's out there?

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    Old 10-18-2007, 08:06 AM   #2
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    Re: Levothyroxine and ST. John's Wart

    There are no definitive answers to this question, but the short answer is that the two may not be compatible.

    There have been lots of studies of levoT and prescription SSRIs. St. Johns wort works like SSRIs. So, some studies have concluded that it does interfere with the normal thyroid axis, and larger doses of levoT were required to keep thyroid levels the same. You may find that your thyroid levels will be even more unstable if you decide to try the herbal ATD.

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