Q&A: Can I Drink Carbonated Drinks?
Do carbonated drinks affect a breastfed baby?
Not really, unless they're caffeinated. (Caffeine has been reported by some moms to cause irritability and colic symptoms in their breastfed babies.) Your afternoon soda shouldn't bother baby, but beware that fizzy drinks can make you feel bloated and full, keeping you from drinking enough fluids during the day.