In: Drugs and Lactation Database (LactMed®) [Internet]. Bethesda (MD): National Institute of Child Health and Human Development; 2006.


Most sources consider breastfeeding to be contraindicated during maternal antineoplastic drug therapy, such as mitoxantrone.[1,2] It might be possible to breastfeed safely during intermittent therapy with an appropriate period of breastfeeding abstinence, but the duration of abstinence is not clear. In one patient, mitoxantrone was still detectable in milk 28 days after a dose of 6 mg per square meter. Chemotherapy may adversely affect the normal microbiome and chemical makeup of breastmilk.[3] Women who receive chemotherapy during pregnancy are more likely to have difficulty nursing their infant.[4]

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