Answers are grounded in this paper and cite their sources.
Pharmacokinetics study shows normal development in infants breastfed by mothers on ustekinumab, suggesting safe breastfeeding.
Lay Summary Ustekinumab was excreted into breast milk at very low levels after both subcutaneous and intravenous administration. Infant serum levels declined despite ongoing breastfeeding, and long-term follow-up showed normal development and no adverse events, supporting continued breastfeeding during ustekinumab treatment.
No takes yet. Share an insight, caveat, or question.
Balmer et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: