There is no doubt that traces of the antibiotic will pass into your daughter's breastmilk. Her baby will be exposed to small amounts of the antibiotic. This may be enough to kill the 'good bacteria'n his digestive system which aid in digestion and protect his immunity. As he completely refuses to drink from a bottle he obviously cannot carry on not feeding. So she will need to breastfeed him again and should give her baby a good probiotic such as Reuteri infant drops 5 drops daily by mouth for 10 days.
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