Thyroid hormones play a role in the production of breastmilk and just like naturally produced thyroid hormones, some thyroid medication will pass to the breastmilk. This is considered safe and is not contraindicated for breastfeeding.^{1 2}

Please also see Medication for more information.

Refer to a primary healthcare provider with any concerns regarding becoming a milk donor and disclose taking thyroid medication to potential recipients.

_______________

1. NHS – Levothyroxine and breastfeeding ↩︎
2. Wendy Jones. 2021. Thyroid Medication (under and over-active) and Breastfeeding ↩︎