allopurinol · Medicine question

Is allopurinol recommended during breastfeeding?

iatroX medicinesPublished 8 November 2026

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Allopurinol is not recommended during breastfeeding because it and its metabolite oxipurinol are excreted in human breast milk, and there are no data on their effects on the breastfed baby.

Sources for this answer

Zyloric Tablets 100mg, 300mgAspen · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 25Document updated 22 October 2026

Sources checked 8 November 2026

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