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Medicines TarlatamabQuestion & answer

Tarlatamab · Medicine question

Is IMDYLLTRA (tarlatamab) known to pass into human breast milk?

iatroX medicinesPublished 8 November 2026

The answer

Answer

It is unknown whether IMDYLLTRA (tarlatamab) is excreted in human milk, and a risk to the breast-fed child cannot be excluded.

Sources for this answer

IMDYLLTRA 1 milligram powder for concentrate and solution for solution for infusionAmgen Ltd · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 3Document updated 6 January 2026

Sources checked 8 November 2026

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More questions about Tarlatamab

Have the effects of IMDYLLTRA (tarlatamab) on fertility been studied?What data are available on IMDYLLTRA (tarlatamab) use during pregnancy?Can IMDYLLTRA (tarlatamab) cause elevated liver enzymes without cytokine release syndrome?Have the safety and efficacy of IMDYLLTRA (tarlatamab) been established in children aged 18 years or younger?How is IMDYLLTRA (tarlatamab) administered, and how long does the infusion take?What do the powder and stabiliser solution in IMDYLLTRA (tarlatamab) look like?

Tarlatamab

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