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Drugs and Lactation Database (LactMed) [Internet]. Bethesda (MD): National Library of Medicine (US); 2006-.

Cover of Drugs and Lactation Database (LactMed)

Drugs and Lactation Database (LactMed) [Internet].

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Yttrium 90 Ibritumomab Tiuxetan

Last Revision: August 17, 2020.

Estimated reading time: 1 minute

CASRN: 1460293-15-5

Drug Levels and Effects

Summary of Use during Lactation

Information in this record refers to the use of yttrium 90 ibritumomab tiuxetan as a therapeutic agent. No information is available on the use of yttrium 90 ibritumomab tiuxetan during breastfeeding. Because of the long half-life of yttrium 90, the manufacturer and expert opinion recommend not administering the drug in women who wish to continue breastfeeding.[1] If the drug is administered to a nursing mother, breastfeeding should be discontinued. No restrictions on holding the infant after administration of the drug are necessary.[2]

Drug Levels

Yttrium-90 decays by emission of beta particles, with a physical half-life of 64.1 hours and a decay energy of 2.28 MeV.

Effects in Breastfed Infants

Relevant published information was not found as of the revision date.

Effects on Lactation and Breastmilk

Relevant published information was not found as of the revision date.


Goldsmith SJ. Radioimmunotherapy of lymphoma: Bexxar and Zevalin. Semin Nucl Med. 2010;40:122–35. [PubMed: 20113680]
Gulec SA, Siegel JA. Posttherapy radiation safety considerations in radiomicrosphere treatment with 90Y-microspheres. J Nucl Med. 2007;48:2080–6. [PubMed: 18006608]

Substance Identification

Substance Name

Yttrium 90 Ibritumomab Tiuxetan

CAS Registry Number


Drug Class

Breast Feeding



Yttrium Radioisotopes

Disclaimer: Information presented in this database is not meant as a substitute for professional judgment. You should consult your healthcare provider for breastfeeding advice related to your particular situation. The U.S. government does not warrant or assume any liability or responsibility for the accuracy or completeness of the information on this Site.


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