Answer
Nurofen Cold and Flu product information states that, in limited studies, ibuprofen appears in breast milk at very low concentrations and is unlikely to adversely affect the breastfed infant.
Sources for this answer
- Nurofen Cold and FluReckitt Benckiser Healthcare (UK) Ltd · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 15Document updated
Sources checked