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Drugs and Lactation Database (LactMed®) [Internet]. Bethesda (MD): National Institute of Child Health and Human Development; 2006-.

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Drugs and Lactation Database (LactMed®) [Internet].

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Mirdametinib

Last Revision: July 15, 2025.

CASRN: 391210-10-9

image 404059264 in the ncbi pubchem database

Drug Levels and Effects

Summary of Use during Lactation

No information is available on the clinical use of mirdametinib during breastfeeding. Because mirdametinib is over 99% bound to plasma proteins, the amount in milk is likely to be low. However, because of its potential toxicity in the breastfed, the manufacturer recommends that breastfeeding be discontinued during mirdametinib therapy and for 1 week 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

Mirdametinib

CAS Registry Number

391210-10-9

Drug Class

Breast Feeding

Lactation

Milk, Human

Antineoplastic Agents

Enzyme Inhibitors

Protein Kinase Inhibitors

MEK 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.

Copyright Notice

Attribution Statement: LactMed is a registered trademark of the U.S. Department of Health and Human Services.

Bookshelf ID: NBK616385PMID: 40694644

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