Answer
No, breastfeeding must be discontinued during Faslodex (fulvestrant) treatment because use during lactation is contraindicated owing to potential serious adverse reactions in breastfed infants, although excretion into human milk is unknown.
Sources for this answer
- Faslodex 250 mg solution for injectionAstraZeneca UK Limited · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 28Document updated
Sources checked