Is Cloxacillin safe while breastfeeding?

Here is what NIH LactMed, the U.S. National Library of Medicine's authority on medicines and breastfeeding, reports about Cloxacillin. This is a summary of that source — not our own verdict.

Effects on the breastfed infant

In a telephone follow-up study, 10 nursing mothers reported taking cloxacillin (dosage unspecified). Two mothers reported diarrhea in their infants. No rashes or candidiasis were reported among the exposed infants.[ 2 ]

Effects on milk supply

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

Levels in milk

Maternal Levels. No studies have reported milk levels after oral cloxacillin. After a single intramuscular dose of 500 mg of cloxacillin in 2 women, milk levels ranged from 0.1 to 0.3 mg/L between 1 and 6 hours after the dose.[ 1 ] Infant Levels. Relevant published information was not found as of the revision date.

Alternatives LactMed lists

Source: NIH LactMed (National Library of Medicine).

Educational summary of an authoritative source — not medical advice. Never start, stop, or change a medicine while breastfeeding without confirming with your doctor.