I just got my wisdom teeth pulled and was on antibiotics for a week. Just tell them you are BFing and they will give you one that is approved for BFing. Also take a probiotic 2 hours after each antibiotic and continue taking probiotcs for at least 2 weeks after the course is finished. I also would give my dd a little probiotic every day while i was taking them along with some yougurt once a day. I just opend the capsule and put a little bit of the powder in her food or mouth. Give her the probiotic for 2 weeks after you are done as well. That should help prevent a yeast infection.