Botox not recommended to breast feeding mothers due to lack of research. FDA warns against pregnant and breastfeeding people using Botox
One of the concerns many mothers have is whether Botox can pass through their breast milk to their babies, causing botulism. Botulism is a very serious condition caused by the bacteria Clostridium botulinum and can result in muscle weakness, breathing problems, and death.
However, there is no scientific proof that toxins from Botox will pass into your breast milk or your baby.
In fact, there are a number of studies that show that it is not likely to cross the placenta and enter the bloodstream. The risk to the mother of developing botulism is also extremely low when she receives cosmetic Botox treatments, because the doses are so minuscule.