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Women who are taking Faslodex and breastfeeding may pass the drug onto their infant, although if it occurs and the exact effects are unknown. The manufacturer recommends that breastfeeding women not take the drug. Because it affects hormones, Faslodex could cause serious side effects in a nursing infant. Talk to your healthcare provider about Faslodex and breastfeeding so you can make a shared decision that is right for you.

Faslodex and Breastfeeding: An Overview

It is not known if Faslodex® (fulvestrant) passes through breast milk. However, because of the potentially serious side effects that could occur in the nursing infant, the manufacturer recommends that women not take Faslodex while breastfeeding. It is also important to remember that Faslodex is approved only for use in postmenopausal women. Therefore, make sure to let your healthcare provider know if you are breastfeeding or thinking of breastfeeding while taking the drug.

Faslodex and Breastfeeding: What Does the Research Say?

Faslodex does pass through breast milk in rats, but it is unknown if it passes through breast milk in humans. It is also not known what effects the drug could have on a young infant. The medication affects hormones; therefore, it may cause serious side effects. If your healthcare provider recommends taking Faslodex while breastfeeding, be sure to watch for any side effects in your child.

Talking With Your Healthcare Provider About Faslodex and Breastfeeding

You should talk with your healthcare provider about Faslodex and breastfeeding. Everyone's situation is different, and your healthcare provider understands your situation best. After considering what you want and expect (as well as your current health situation) you and your healthcare provider can make a shared decision about Faslodex and breastfeeding that is right for you.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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