Implanon And Nature-throid

ProfK8ie Says:

Hello! I'm 33 and have been on Implanon since 2017. Prior to that, I was on Depo Provera for about 10 years. I prefer these forms of birth control since I do not menstruate while I'm on them. I do not have PCOS, nor have I been diagnosed with endometriosis, however my periods were always very painful and I prefer to avoid them for this reason. My doctor(s) have always been amenable. I recently began taking Nature-Throid and Metformin and, after nearly 12 years of not menstruating (beyond the occasional light spotting when my Depo shot was due), started my period. Does anyone know whether thyroid medication or Metformin can impact menstruation in this way? I was on a lower dose of the same thyroid medication for a month previously, but my doctor doubled it recently and now, BAM, I'm bleeding. I'm wondering if there's a causal relationship here?

4 Replies

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Kevin Says:

Hello Profk8ie,

According to the National Institute of Health Nature-Throid contains 38 mcg levothyroxine (T4) and 9 mcg liothyronine (T3) for each 65 mg (1 Grain) of the labeled content of thyroid. This medication is used to treat underactive thyroids (hypothyroidism).

The thyroid gland is in charge of storing and producing the hormones that affect nearly every organ and function of our body. Because you started taking Nature-Throid, a medication designed to increase the activity of your thyroid, it is understandable that you are going to see some changes in your menstruation.

Some other information to consider is that hypothyroidism also has the tendency to cause menstruation cycles to be longer and far more painful than a healthy and active thyroid. In addition, hypothyroidism can cause irregular and more frequent menstruation cycles.

It may be that this is a one time issue while your body adjusts to the new dosage of Nature-Throid and there really isn't much you can do for this cycle but it would be wise to discuss these concerns with your doctor as they will be the equipped to address your situation properly.

Here is a link for more information if you are interested in learning more about your medication.
[1] NIH Nature-Throid

I hope this information helps.

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ProfK8ie Says:

Re: Kevin (# 1) Expand Referenced Message

Hi Kevin, Thank you for your reply! I put a call in to my physician, but have not yet heard back from her. I am hoping it's a one-time thing, as I chose my birth control specifically to avoid having periods. I would prefer to have a tubal ligation or partial hysterectomy (I have previously had cervical cancer), but my insurance won't cover it. Hopefully I will hear from my doc soon.

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Depressed and Angry Says:

Personally I would be very cautious about the bleeding. Might be nothing, but worth checking out.

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ProfK8ie Says:

Re: Depressed and Angry (# 3) Expand Referenced Message

The bleeding lasted 6 days. I finally heard from my doctor on a Friday, and she said if I was still bleeding Monday to let her know. It stopped Saturday. I'm going to see if I start again next month, and if so, call again and get some blood work done.

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