Baby it’s cold outside…and ‘tis the season for MotherToBaby to answer questions about cough and cold medications while breastfeeding. Some “Cold” Hard Facts Factors such as your baby’s age and whether they were born prematurely or have chronic health problems matter. Very young babies (less than 3 months old) may have a more difficult time metabolizing medications in the milk and may be more susceptible to side effects like sleepiness. Milk is also their complete diet, …