Can Breastfeeding Women Take Thyroid Medication? Experts Explain

Balasahana Suresh
Thyroid-related disorders, including hypothyroidism and hyperthyroidism, have become increasingly common among women. The thyroid gland, located in the neck, produces hormones that regulate metabolism, energy levels, and overall body function.

For breastfeeding women, questions often arise: Is it safe to continue thyroid medication while nursing? Could it affect the baby? Experts weigh in on what you need to know.

Thyroid Medications and Breastfeeding

Levothyroxine (for hypothyroidism)

Safe for breastfeeding: Studies show that only a tiny amount of levothyroxine passes into breast milk.

It does not affect the baby’s thyroid function.

Recommended to take the medication on an empty stomach, usually 30–60 minutes before breastfeeding, for optimal absorption.

Anti-thyroid Medications (for hyperthyroidism)

Methimazole and Propylthiouracil (PTU) can be used cautiously.

Low doses are generally safe, but the baby should be monitored for thyroid function.

Experts often recommend methimazole over PTU, except during the first trimester of pregnancy.

Tips for Breastfeeding Mothers on Thyroid Medication

Continue regular doctor consultations to adjust the dose as needed.

Monitor for symptoms of thyroid imbalance in both mother and baby.

Maintain a healthy diet rich in iodine and selenium, which support thyroid health.

Avoid self-adjusting doses—thyroid medication should always be personalized.

Bottom Line

Most thyroid medications are compatible with breastfeeding, and continuing treatment is crucial for maternal health. Proper dosing and regular monitoring ensure both mother and baby remain healthy.

 

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The views and opinions expressed in this article are those of the author and do not necessarily reflect the official policy or position of any agency, organization, employer, or company. All information provided is for general informational purposes only. While every effort has been made to ensure accuracy, we make no representations or warranties of any kind, express or implied, about the completeness, reliability, or suitability of the information contained herein. Readers are advised to verify facts and seek professional advice where necessary. Any reliance placed on such information is strictly at the reader’s own risk.

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