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Can You Donate Blood on Thyroid Medication Like Levothyroxine?

Donating blood can be a wonderful thing. However, can we give blood if we have hypothyroidism or Hashimoto’s? And can we give blood if we’re on medication for this, such as Levothyroxine, Cytomel or NDT (e.g. Armour Thyroid)?

Blood Test Thyroid

The short answer is: Yes

Most people with hypothyroidism and Hashimoto’s can donate blood, as long as they meet the standard eligibility criteria and are stable on their thyroid medication (thyroid hormone replacement therapy).

This usually means that your levels have been optimal and stable on the same dose for at least a few months.

Optimal Thyroid Levels Are:

  • TSH below 2.5
  • Free T3 in the top quarter of the range
  • Free T4 midrange or slightly higher
  • Thyroid Peroxidase Antibodies and Thyroglobulin Antibodies within normal ranges

Optimal levels are explained in more detail here.

If you are still stabilising and optimising your thyroid condition, planning to change type of medication soon, are waiting on further blood tests, scans or an appointment with the endocrinologist, then you are advised to wait until all of this is completed, before giving blood.

Keep In Mind

It is worth keeping a couple of things in mind, however.

Firstly, many thyroid patients also have low levels of ferritin (stored iron), Vitamin D, B12 and more, which can further be exacerbated by donating blood, since a large quantity is typically donated in one session. If you regularly donate blood, it would be worth keeping a close eye on your key vitamin levels, and considering supplementing to maintain good levels.

I personally cannot give blood due to being so prone to anaemia (very low iron levels).

Secondly, regularly donating blood may lead to a drop in your thyroid hormone levels, which may require a small dosage adjustment, so it is recommended that we closely monitor thyroid hormone levels to ensure that donating blood isn’t impacting them, which can cause a return in thyroid symptoms such as low mood, fatigue, weight gain, muscle pain and more.

If you are on thyroid medication yet still feel unwell, it is probably worth exploring why and seeking other underlying causes or ‘jigsaw puzzle pieces’ before donating blood, to avoid making yourself feel even worse.

Be Your Own Thyroid Advocate Book Girl Holding

Don’t forget that Be You’re Own Thyroid Advocate: When You’re Sick and Tired of Being Sick and Tired covers all of this and so much more, making it easy to know how to live well with your thyroid condition.

Conclusion

While thyroid patients may meet the eligibility criteria for donating blood and being on thyroid medication doesn’t necessarily stop us from doing so, it may be that your body is impacted negatively, or your thyroid condition becomes a little less stable by doing so.

We’re all individual, so it is likely a case of seeing how it impacts (or doesn’t impact) you and your health. If you experience a thyroid flare following a blood donation, you will need to weigh up whether you feel it is worth continuing with the blood donations.

What are your experiences with this?

About Author

Rachel Hill is the internationally acclaimed and multi-award winning thyroid patient advocate, writer, speaker and author behind The Invisible Hypothyroidism. Her thyroid advocacy work includes authoring books, writing articles, public speaking, appearing on radio, TV and podcasts, as well as creating her popular weekly email newsletters. She has also been a board member for both The American College of Thyroidology and WEGO Health, and a council member for Health Union. Rachel has worked with and been featured by UK thyroid charities, The National Academy of Hypothyroidism, The BBC, Yahoo, MSN, ThyroidChange and more. She is well-recognised as a leading thyroid health advocate in the thyroid community and has received multiple awards and recognitions for her work and dedication. She lives in the UK, however, advocates for thyroid patients worldwide. Her bestselling books include "Be Your Own Thyroid Advocate", "You, Me and Hypothyroidism" and the children's book "Thyroid Superhero".

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