Can Mothers with Hashimoto's Thyroiditis Breastfeed Safely?

I would like to ask if a mother with Hashimoto's thyroiditis can breastfeed?

I would like to ask if a mother with Hashimoto's thyroiditis can breastfeed.
She has hypothyroidism and needs to take medication (M84 Thyroxine sodium 0.1mg) for supplementation, which she has been taking for nearly two years.
I consulted a metabolic doctor who mentioned that it is not recommended, but he was not entirely certain in saying it was not possible.
Therefore, I hold onto a glimmer of hope, as I have a history of allergies and gastrointestinal issues.
I have heard that breastfeeding can improve the baby's constitution, and I would like to give it a try.
I am currently very anxious because I am about to give birth in a few days and still do not have an answer.
If I stop taking the medication, would that allow me to breastfeed? Regardless of the answer, I hope it is the best for the baby!

Chongzi, 20~29 year old female. Ask Date: 2006/03/11

Dr. Xu Yiyuan reply Pharmacology

There is no clear evidence indicating that thyroxine sodium has serious effects on breastfeeding infants.
However, there is evidence that a small amount of the medication can be passed to the infant through breast milk, which may interfere with the screening results for congenital hypothyroidism in newborns.
Due to the small amount of the drug being secreted into breast milk, it is advisable to discuss with your physician the potential effects of reducing your dosage by half on both you and your infant.
This may help address your concerns.

Reply Date: 2006/03/11

More Info

Breastfeeding mothers with Hashimoto's Thyroiditis can generally breastfeed safely, but there are important considerations to keep in mind. Hashimoto's Thyroiditis is an autoimmune condition that leads to hypothyroidism, which means the thyroid gland does not produce enough thyroid hormones. This condition is typically managed with medication, such as Levothyroxine (often referred to by its brand name, Synthroid or M84 Thyroxine sodium), to help maintain normal thyroid hormone levels.

The primary concern for breastfeeding mothers is whether the medication they are taking is safe for their infant. Levothyroxine is considered safe for breastfeeding mothers. Studies have shown that the amount of Levothyroxine that passes into breast milk is very low and is unlikely to have any significant effect on a breastfeeding infant. The benefits of breastfeeding, including the provision of essential nutrients and antibodies, often outweigh the risks associated with the low levels of medication in breast milk.

It is important to note that stopping medication without medical guidance is not advisable. Sudden discontinuation of Levothyroxine can lead to a return of hypothyroid symptoms in the mother, which can affect her overall health and well-being. This, in turn, can impact her ability to care for her newborn. Maintaining stable thyroid hormone levels is crucial not only for the mother's health but also for her ability to produce breast milk effectively.

In terms of breastfeeding and the potential impact on the baby, research indicates that breastfeeding can indeed provide numerous health benefits for infants, including a stronger immune system and a lower risk of certain chronic conditions. For mothers with allergies or gastrointestinal issues, breastfeeding may also help in reducing the risk of similar issues in their infants.

If you are concerned about your ability to breastfeed while managing Hashimoto's Thyroiditis, it is essential to have an open discussion with your healthcare provider. They can provide personalized advice based on your specific health situation and medication regimen. They may also monitor your thyroid levels during breastfeeding to ensure that you are receiving the appropriate dosage of medication.

In summary, mothers with Hashimoto's Thyroiditis can breastfeed safely while taking Levothyroxine. The medication is deemed safe for breastfeeding, and the benefits of breastfeeding for both the mother and the infant are significant. It is crucial to continue taking prescribed medications and consult with your healthcare provider for any concerns regarding your health or breastfeeding. This approach will help ensure the best possible outcomes for both you and your baby.

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