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

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Drugs and Lactation Database (LactMed) [Internet].

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Nafcillin

Last Revision: October 31, 2018.

CASRN: 147-52-4

Chemical structure

Drug Levels and Effects

Summary of Use during Lactation

Although no information is available on the use of nafcillin during breastfeeding, penicillins are generally not expected to cause adverse effects in breastfed infants. Occasionally disruption of the infant's gastrointestinal flora, resulting in diarrhea or thrush have been reported with penicillins, but these effects have not been adequately evaluated. Nafcillin is acceptable in nursing mothers.

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.

Alternate Drugs to Consider

Dicloxacillin, Oxacillin, Methicillin

Substance Identification

Substance Name

Nafcillin

CAS Registry Number

147-52-4

Drug Class

  • Breast Feeding
  • Anti-Infective Agents
  • Antibacterial Agents
  • Penicillins

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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