Cancer Home > Myleran and Breastfeeding

The manufacturer of Myleran (busulfan) recommends that women not breastfeed during chemotherapy with this drug. Although it is unknown if this drug passes through breast milk, it could cause serious side effects in a nursing infant. Some of the potential risks to the child include low blood cell counts and an increased risk for developing certain types of cancer.

Can Breastfeeding Women Take Myleran?

Myleran® (busulfan) is a prescription anticancer medication that belongs to a group of medicines known as alkylating agents. It is not known whether Myleran passes through breast milk. However, the manufacturer of the drug recommends women should not breastfeed during Myleran treatment.

More Information on Myleran and Breastfeeding

Myleran has not been adequately studied in breastfeeding women. Therefore, it is not known how much, if any, of the drug passes through breast milk, or whether it would be harmful to a nursing child. There is one report of a woman using this medication while breastfeeding, with no significant problems occurring in the nursing infant.
However, one report is not enough information to say for certain that Myleran is generally safe for use during breastfeeding. In fact, many experts advise that women not breastfeed during Myleran treatment.
Myleran is associated with potentially serious side effects, including low blood cell counts. The medication may also increase the risk for developing certain types of cancer. There is a possibility that these harmful effects could occur in a child exposed to the medication while nursing. Therefore, it is generally recommended that women avoid breastfeeding during Myleran treatment.

Talking With Your Healthcare Provider

You should discuss breastfeeding and Myleran 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.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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