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Letrozole use while Breastfeeding

Drugs containing Letrozole: Femara, Kisqali Femara Co-Pack

Medically reviewed by Drugs.com. Last updated on Jul 2, 2020.

Letrozole Levels and Effects while Breastfeeding

Summary of Use during Lactation

No information is available on the use of letrozole during breastfeeding. The manufacturer recommends that breastfeeding be discontinued during letrozole therapy and for 3 weeks after the last dose.

Drug Levels

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

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

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.

Substance Identification

Substance Name

Letrozole

CAS Registry Number

112809-51-5

Drug Class

  • Breast Feeding
  • Lactation
  • Antineoplastic Agents
  • Aromatase Inhibitors

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.

Further information

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