Amiodarone and Breastfeeding

Because amiodarone has been shown to pass through breast milk in women and can cause potentially serious problems, women who are taking it are generally advised to not breastfeed. Amiodarone can cause heart or thyroid problems in nursing infants whose mothers use it. Make sure to talk to your healthcare provider before taking this drug while breastfeeding.

Can Breastfeeding Women Use Amiodarone?

Amiodarone (Cordarone®, Pacerone®, Nexterone®) is a prescription antiarrhythmia medication. This drug has been known to pass through breast milk in humans. In general, women who are using amiodarone are advised to not breastfeed.
 

More Information About Amiodarone and Breastfeeding

In human studies, amiodarone has been shown to pass through breast milk in amounts that were large enough to potentially cause problems in a nursing infant. There have been several cases where no problems were reported in nursing infants whose mothers took the medicine. However, there has also been a case in which a nursing child exposed to this medication through breast milk developed symptoms of an underactive thyroid (hypothyroidism).
 
Importantly, amiodarone contains a significant amount of iodine. Iodine has been reported to cause hypothyroidism (an underactive thyroid) in breastfed infants.
 
In general, it is recommended that women who take amiodarone not breastfeed. In addition, because the drug can stay in the body for months after treatment ends, breastfeeding is also generally discouraged in women who have recently taken amiodarone. If your healthcare provider recommends breastfeeding during amiodarone treatment, or within months after you stop treatment, your baby's heart and thyroid should be monitored to make sure no serious problems occur.
 
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