Can I take Pemivibart while breastfeeding?

Is Pemivibart safe while breastfeeding?

Here is what LactMed, the Drugs and Lactation Database published by the U.S. National Institute of Child Health and Human Development (NICHD), reports about Pemivibart. The text below is quoted from that source — it is not our own verdict.

Summary of use during breastfeeding

Pemivibart is a monoclonal antibody directed against the Omicron lineage of SARS-CoV-2. No information is available on its clinical use during breastfeeding. Because is a large protein molecule with a molecular weight of 147,500 Da, the amount in milk is likely to be very low.[1] It is also likely to be partially destroyed in the infant's gastrointestinal tract and absorption by the infant is probably minimal.[2] Until more data become available, pemivibart should be used with caution during breastfeeding, especially while nursing a newborn or preterm infant.

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

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

Alternatives LactMed lists

Nirmatrelvir

“No published information” means the studies do not exist yet — not that Pemivibart 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: Drugs and Lactation Database (LactMed), National Institute of Child Health and Human Development (NICHD), via NCBI Bookshelf, record “Pemivibart” (pemivibart). LactMed on NCBI Bookshelf. LactMed is a registered trademark of the U.S. Department of Health and Human Services.

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