I took combantrim whilst bf'ing. We spoke to the chemist about it and she said it was ok for me to have 1 treatment, we just couldn't treat Maggie. DH had to have more was he works with sewer line. Not sure if we had worms, but I saw a big one in toilet, could have been us or one of the builders who had been around, so we took combantrim to be on the safe side. I think you need to go to the doctor to have a baby treated.