Rythmol and Breastfeeding

Clinical studies have shown that Rythmol (propafenone) does pass through breast milk. However, it is unknown what effects this medication might have on a nursing infant. Due to the risk for potentially serious side effects, the manufacturer recommends that women not take Rythmol while breastfeeding. Make sure to discuss these potential risks with your healthcare provider before starting treatment.

Can Breastfeeding Women Take Rythmol?

Rythmol® (propafenone) is a prescription arrhythmia medication used to maintain a normal heart rhythm or to treat certain heart rhythm problems. It has been shown to pass through breast milk.
 

More Information About Rythmol and Breastfeeding

Based on the results of limited studies, Rythmol can be expected to pass through breast milk. In two separate clinical studies, two women were given Rythmol while breastfeeding. In these studies, the drug was found in the breast milk of both women in small amounts. It was estimated that a nursing infant would consume between 0.03 and 0.1 percent of the mother's Rythmol dosage. Unfortunately, neither study looked at the potential effects on a nursing infant.
 
Because Rythmol is associated with potentially serious side effects, the manufacturer recommends that women either breastfeed or take Rythmol, but not do both. However, other experts suggest that doses up to 900 mg a day are unlikely to cause any significant side effects in a nursing child, especially if the child is older than two months of age.
 
If your healthcare provider recommends Rythmol while you are breastfeeding, make sure to closely observe your infant for any potential side effects. Let your child's healthcare provider know if you notice anything that doesn't seem right.
 

Talking With Your Healthcare Provider

You should discuss breastfeeding and Rythmol use with your healthcare provider. Each woman's situation is different, and you and your healthcare provider understand your situation best. After considering what you want and expect, as well as your current health situation, the two of you can make a shared decision that is right for you.
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Rythmol Medication Information

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