Is Cefprozil safe while breastfeeding?
Here is what NIH LactMed, the U.S. National Library of Medicine's authority on medicines and breastfeeding, reports about Cefprozil. This is a summary of that source — not our own verdict.
Effects on the breastfed infant
Relevant published information was not found as of the revision date.
Effects on milk supply
Relevant published information was not found as of the revision date.
Levels in milk
Maternal Levels. Nine healthy women were given a single 1 gram dose of cefprozil orally 6 to 12 months postpartum. Milk levels of cis -cefprozil (which accounts for 90% of cefprozil) ranged from 0.7 to 1.3 mg/L during the 12 hours after the dose. The peak level averaged 3.4 mg/L at 6 hours after the dose. By 24 hours after the dose, milk cefprozil levels were 0.3 mg/L.[ 1 , 2 ] Using the peak milk level value and assuming that the trans -isomer adds an additional 10% to the peak, an exclusively breastfed infant would receive a maximum of 3.3% of the weight-adjusted maternal dosage. Infant Levels. Relevant published information was not found as of the revision date
“No published information” means the studies do not exist yet — not that Cefprozil is known to be harmful, and not that it is known to be safe. Your prescriber or pharmacist can weigh your baby's age and whether a better-studied alternative would do the same job. Worth asking before stopping a medicine you need.
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.