Post-Delivery Newborn Medications (💡The Baby B’s) 👁️Erythromycin Ophthalmic Ointment Prophylactically administered to prevent ophthalmia neonatorum, an eye infection which can rapidly lead to blindness. This drug is required by law in the United States in most states. 💉Vitamin K: Administered intramuscularly to aid the newborn in clotting of their blood. Why? The newborn’s gut is sterile and does not produce vitamin K until about one week after birth. This medication helps the baby clot prope