Dear Sara, I will try to be nice but is this doctor from the stone ages?! What happens in another part of the body doe not then "enter" into the breast milk, and there is definately no posioning of the milk. Not only can this mom continue to breastfeed she can also have surgery and continue to breastfeed. I think I will take a quote from Dr. Jack, ask this doctor for the literature to prove his statement. Ann Perry RN IBCLC