No data exist on the medical use of botulin B during breastfeeding. However, it is not detectable systemically after intramuscular use, thus excretion into breast milk is considered unlikely. The closely related drug, onabotulinumtoxinA was not detectable in the milk of two women and detectable in only minute amounts in two others after 40 to 92 units injected into the face.[1] One infant was safely breastfed during maternal botulism and no botulinum toxin was detectable in the mother's milk or infant. Breastfeeding appears to protect infants against botulism.[2] No special precautions are required.