The Association of Anaesthetists has provided a draft copy open for comment on the topic of breastfeeding and anesthesia/sedation.
In general, the conclusion is that only tiny amounts of most agents are present in breast milk and feeding can be resumed after anesthesia once the mother is awake and lucid. The practice of “pump and dump” is largely unnecessary. However this draft document looks at all commonly used agents in anesthesia and sedation and evidence is in some cases limited, and some agents may pose some degree of risk, like Oxycodone.
Single doses of most analgesics pose little risk but caution is advised with repeated doses.