Ranibizumab and aflibercept, two drugs used to treat retinal diseases, are excreted in the breast milk of nursing mothers who take the medications. The drugs contain an agent called anti-vascular endothelial growth factor (anti-VEGF), which blocks the development of a protein which stimulates the development of blood vessels. The protein, VEGF, is present in breast milk and plays a role in the development of the digestive system in infants.
