Hi, I am a midwife and recently had to reaserch this for one of my clients , this is a quote from one of the best sources I know , " The ultimate brearfeeding biik of answers,by Jack Newman, MD"
Most drugs that are used during general anesthesia are short-acting drugs that arenot absorbed by the intestine. Most of the ones that can be absorbed will be present in the milk only in tiny amounts and will be therefor only a short time, once the drug is no longer being given. the risk of a small amount of any of these anesthetic or tranquilizing drugs being found in the milk after anesthesia is virtually zero. the mother can breastfeed as soon as she is awake ad up to it. The same goes for drugs used for local anesthesia, such as dental surgery, ,These drugs may appear in the milk, but are not absorbed by the baby's digestive system, so the baby will just get rid of them through thier bowel movements.
And Beleive me , this guy, Jack Newman, is not a conservative , he is a genuine advocate for women and babies. Any more quetions , give Charity Pitcher Cooper a call, she's a wonderful lactation consultant, and is on Mamsource! ###-###-####.