Marqibo and Breastfeeding

Because it is unknown if Marqibo (liposomal vincristine) passes through breast milk, it is usually recommended that women not breastfeed during treatment with this drug. Marqibo is associated with potentially dangerous side effects, so it is possible that these problems could occur in a nursing infant. Your healthcare provider can advise you on when it may be safe to start breastfeeding after Marqibo treatment ends.

Can Breastfeeding Women Use Marqibo?

Marqibo® (liposomal vincristine sulfate) is a prescription medication approved to treat adults with Philadelphia chromosome negative (Ph-) acute lymphoblastic leukemia (ALL) who have been previously treated with at least two other therapies. It is not known whether Marqibo passes through breast milk. The manufacturer of the medication recommends that women should not receive Marqibo while breastfeeding.

More Information on Marqibo and Breastfeeding

There is very little information available about Marqibo and breastfeeding. The drug has not been studied in breastfeeding women. Therefore, it is unknown if the drug passes through breast milk, or if it would harm a nursing infant.
Although this lack of information is certainly frustrating, it is important to understand that studies of medicines are rarely done in breastfeeding women. This is because such studies could expose an infant, who would otherwise usually not benefit from the medication, to potential problems.
Many medicines pass through breast milk, so it is not unreasonable to assume that Marqibo could pass through breast milk to some extent. Marqibo is associated with significant side effects, which could cause serious problems in newborns exposed to the medicine through breast milk. Until more information is available, the potential risk for Marqibo side effects to occur in a nursing child cannot be ruled out.
It is generally recommended that women not breastfeed during Marqibo treatment. If you would like to breastfeed after Marqibo treatment, talk to your healthcare provider about when it may be safe to do so.
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