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    Old 09-21-2007, 12:51 PM   #1
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    Contraceptive Pill/Thyroxine


    Does anyone know whether taking the Contraceptive Pill affects Thyroxine? I asked my Consultant (who is a Head and Neck Surgeon) whether it does and he said no, but I have read that you will need an increased dose of Thyroxine if you are on the Pill. Who is right and if it does affect it, how?

    Any help would be much appreciated.

    Many thanks,


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    Old 09-22-2007, 07:22 PM   #2
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    Re: Contraceptive Pill/Thyroxine

    I have been taking the pill since before I've been on synthroid, and thuse, it's all been adjusted to it since I started. If you start the pill after you are regulated on hormone, then it's an issue because the estrogen effects the absorption of the T4.

    Old 09-23-2007, 03:34 PM   #3
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    Re: Contraceptive Pill/Thyroxine

    I had been taking Synthroid for years and was doing fine. I then added the birth control pill (Mircette). Within 3 months, my TSH went from 1.0 to about 8.5!! I even increased my Synthroid dose and could not get the TSH to go down. It was interfering very badly with me. Every doctor I talked to acted like I was from another planet. So I stopped taking them.

    Old 09-24-2007, 06:18 AM   #4
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    Re: Contraceptive Pill/Thyroxine

    My Endo said that my low conversion of T4 to T3 is often the result of taking a birth control pill. The first question she asks and under converter (T3 uptake - Lower that normal range) is iff they are on the pill. Then she says.. well that explains it. She doesn't recommend ceasation of the pill but says that in the case of a lower T3 Uptake T3 medication supplementation tends to be necessary to get the body feeling right.

    If we learn by our mistakes, I am working on one hell of an education.

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