Dr. Cheryl Kasdorf, NDAlternative MedicineThyroid Meds before Thyroid Blood Test?


Thyroid Meds before Thyroid Blood Test? — 9 Comments

  1. I have recently done this, as I take NatureThroid and waited until after the blood test to take my meds. The only problem is that I don’t know if I am on the correct dose because my test results show worse numbers than the one I had previously. PLEASE help!!! Also, after much reading of various articles I am wondering if you have had any patients reporting major hair loss (like male pattern baldness) and weight gain on the Nature Throid? I have been shedding hair like crazy since diagnosed with Hypothyoidism about 15 yrs ago, and since being treated. This more aggressive hair loss is VERY concerning!!! Not only is my hair thinning, shedding, it has also lost its curly texture. 🙁

    • Hi Becky
      Your question points out the issue that you cannot expect everything to get better just by taking the proper thyroid medication. Perhaps you need more if your numbers are not ideal, but with your symptoms you also need to have other hormones checked. In particular, you need to look at adrenal function, female hormone function, and insulin and blood sugar issues. In addition, if we dig down to the instigating causes, a lot of thyroid issues are related to environmental toxins and pesticides, as well, the symptoms you describe could be due to ongoing exposure and inability to naturally release those toxins. So a Naturopathic wholistic approach getting to the underlying causes is the only way to successfully address all your symptoms.

  2. Hi Cheryl-
    I believe I’ve followed the correct procedure for testing while on NDT meds, but different people on the same website are telling me different opinions as to whether I did it correctly. I take meds in the am when i wake up each day, but the day of testing TSH, FT3 etc, I didn’t take the meds till after. So I waited about 24 hours and then tested, but took the meds after. I had also been on the same level (1.5 grains) for 6 weeks. Below are my results. As you can see my TSH is suppressed yet my FT3 is in the lower third. I think this is reflected in the way I feel.

    FT4 = 1.06 range 0.82-1.77
    FT3 = 2.8 range 2.0 – 4.4
    TSH = 0.19 range 0.450-4.5
    RT3 = 18.6 range 9.2 – 14.1
    DHEA = 59 range 31-701
    Vit D = 43 range 30-100
    Cortisol = 18.0 range 6.2 – 19.4
    Aldosterone = 11.6 range 0-30.0
    TPO antibodies = 9 range 0-34

    FT3/RT3 ratio= 2.8 x 100/18.6 = 15.05

    Did I do the test correctly? And shouldn’t my FT3 be higher? I’m only taking 1.5 grains and I believe I need to increase my dose or add some cytomel.

    • Hi William,
      Yes, you will find different opinions on the web. As you are asking for medical advice, I recommend you find a doctor who thinks like you for an appointment. I cannot give medical advice on the internet. The one thing to consider is your patterns of symptoms, you say “this is reflected in the way I feel.” Your symptoms can lead to where your issue is, and it is not necessarily directly caused by the thyroid. Your doctor can correlate symptoms with how you tested previously and how you test now, and discern where the issue is.
      In health,
      Dr. Cheryl

  3. Thank you for the information! I have a quick question though… Would there be any benefit to skipping the medication for a couple days leading up to the blood test, or is simply skipping it on the morning of the test enough (in the case of Nature Throid)?


    • Hi Megan,
      Thank you for reading this blog. The thyroid medication is being introduced to your system and starts being removed from your system at a rate such that when you take a daily dose you get a steady state. If you were to skip several days, most likely you would feel the effect and the steady state would be affected.
      You don’t want the dose of Naturethroid to skew the test results, to take it after the test, and be sure to take it!
      In health,
      Dr. Cheryl

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