Can I Breastfeed While Taking Propylthiouracil for Hyperthyroidism?

Breast milk..?

Hello doctor, I have hyperthyroidism and would like to ask if it is safe to breastfeed while taking Propylthiouracil (PTU)? Is it safe for my baby?

yu, 20~29 year old female. Ask Date: 2015/08/11

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, the dose of Propylthiouracil (PTU) that reaches breast milk should be very low, and theoretically, the impact is minimal.
It should be safe to breastfeed.
Wishing you good health.

Reply Date: 2015/08/11

More Info

Yes, you can breastfeed while taking Propylthiouracil (PTU) for hyperthyroidism, but there are important considerations to keep in mind regarding the safety of your baby and your own health.

Propylthiouracil is an antithyroid medication commonly prescribed to manage hyperthyroidism, particularly in conditions like Graves' disease. It works by inhibiting the synthesis of thyroid hormones, thereby helping to control the symptoms associated with an overactive thyroid. When it comes to breastfeeding, PTU is considered relatively safe, but it is crucial to monitor both your thyroid function and your baby's health.

Research indicates that PTU is excreted in breast milk, but the levels are generally low. The American Thyroid Association suggests that the benefits of breastfeeding while on PTU typically outweigh the potential risks. However, it is essential to ensure that your baby is regularly monitored for any signs of thyroid dysfunction, especially if there is a family history of thyroid issues or if the baby shows any unusual symptoms.

To ensure the safety of breastfeeding while on PTU, here are some recommendations:
1. Monitor Thyroid Levels: Regularly check your thyroid hormone levels to ensure that your medication dosage is appropriate. This is important not only for your health but also for the well-being of your baby.

2. Consult Your Pediatrician: Keep your pediatrician informed about your medication. They can help monitor your baby for any potential side effects and ensure that your baby is developing normally.

3. Watch for Symptoms: Be vigilant for any signs of thyroid dysfunction in your baby, such as excessive sleepiness, poor feeding, or unusual irritability. If you notice any concerning symptoms, consult your healthcare provider immediately.

4. Adequate Iodine Intake: Ensure that you are getting enough iodine in your diet, as it is essential for thyroid function. This is particularly important for breastfeeding mothers, as iodine is crucial for the baby's development.

5. Consider Alternatives: If you have concerns about PTU while breastfeeding, discuss with your healthcare provider the possibility of alternative treatments for hyperthyroidism that may be safer during lactation.

In conclusion, while it is generally safe to breastfeed while taking Propylthiouracil, it is vital to maintain open communication with your healthcare providers. Regular monitoring of both your thyroid function and your baby's health will help ensure a safe breastfeeding experience. Always consult your doctor before making any changes to your medication or breastfeeding practices.

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