Over the years, many, many, many women have been wrongly told to stop breastfeeding. The decision about continuing breastfeeding when the mother must take a drug, for example, involves more than consideration of whether the medication appears in the mother's milk. It also involves taking into consideration the risks of formula feeding for the baby, which are substantial, the risks of not breastfeeding for the mother, which are substantial, and other issues as well. On the other hand, it should be taken into consideration that some babies just will not take bottles, so the advice to stop is not only usually wrong, but impractical as well. Furthermore, it is easy to advise the mother to pump her milk when she is not feeding the baby, but adequate pumping is often very difficult to do for some mothers, with the result that the mothers may become very painfully engorged, which may further lead to serious complications.
Most drugs appear in the milk, but only in very tiny amounts.
Although a very few drugs may still cause problems for infants even in tiny doses, this is not the case for the vast majority. Mothers who are told they must stop breastfeeding because of a certain drug should ask to be prescribed an alternative medication which is acceptable for breastfeeding mothers. In this day and age, it is rarely a problem to find such an alternative. If the prescribing physician is not flexible, the mother should seek another opinion. Examples are amoxycillin, cloxacillin, most antibiotics.