erythromycin · Medicine question

Does erythromycin pass into breast milk?

iatroX medicinesPublished 8 November 2026

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Erythromycin can pass into breast milk, and caution is advised when administering it to breastfeeding mothers because infantile hypertrophic pyloric stenosis has been reported in breastfed infants.

Sources for this answer

Erythromycin 250 mg Gastro-resistant TabletsBrown & Burk UK Ltd · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 8Document updated 16 June 2025

Sources checked 8 November 2026

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What does the evidence say about erythromycin exposure during the first trimester of pregnancy and congenital malformations?Does erythromycin affect the ability to drive or use machines?How does erythromycin act against susceptible bacteria?What are the most frequent side effects of oral erythromycin?What is the association between erythromycin exposure in infancy and infantile hypertrophic pyloric stenosis?Which skin and soft tissue infections are erythromycin gastro-resistant tablets used to treat?

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