In my ever-present search for knowledge, I decided to look as far into this as I could with the help of my computer, because I am curious to know the answer. My son takes enough from a bottle that he can go without breastfeeding for 24 hours now, but I am sure there are other mothers out there who may be more embarrassed than I to post here who may be looking for information.
Here are some things I found:
About drugs in general and breastfeeding:
The issue of which drugs are safe to take during lactation is quite complicated. Many factors must be taken into consideration, such as... The route of administration (your baby is always exposed through the GI tract, but drugs can enter your system several different ways: orally, intravenously, intramuscularly, topically, or through inhalation – topical medications (skin creams) and medications inhaled or applied to the eyes or nose reach the milk in lesser amounts and more slowly than other routes and are almost always safe for nursing mothers; oral medications take longer to get into the milk than IV and IM routes (the drug must first go through the mother’s GI tract before it enters the bloodstream, and the milk supply)–with IV drugs, the medications bypasses the barriers in the GI tract to enter the milk quickly and at higher levels, and with IM injections, drugs transfer quickly into the milk because the muscles have so many blood vessels, so the drug enters the bloodstream quickly.(
http://www.breastfeedingbasics.com/html/drugs_and_bf.shtml)
This tells me, based on the other information that was posted here, that the pp was correct in saying that about 6 hours into a trip it would already be ok to breast feed again. If the half-life is only 3-6 hours and it takes more than that long to make it to the milk, common sense says that any trace amounts that did make it to the milk would be inert by the time the LSD made it to the mother's milk, the baby was ready to nurse again (every 4-6 hours for non-newborn babies,e very 2-4 hours for newborns under 2 months old), the baby ingested the milk into his digestive tract, and then the LSD absorbed into the baby's GI tract and made it's way to the baby's brain. I would say 12 hours after dosing, unless it was an unusually large amount, would be sufficient.
From the same site:
some doctors are hesitant to prescribe any medication for a nursing mother once they know that even a tiny amount enters the mother’s milk. Many doctors are afraid to prescribe a drug because of the conservative approach taken toward giving drugs to a pregnant woman. They feel that if a drug might possibly cause birth defects in a pregnant woman, then they shouldn’t give it to a lactating woman. The difference is that while the placenta lets drugs enter to cross into the developing fetus’s bloodstream, the breast serves as a very effective barrier for a fully developed infant.
This is a very good point. The placenta acts as a funnel, giving most of what the pregnant mother ingests to the fetus. However, the fatty tissues of the lactating mother's body absorbs most of the chemicals before it ever reaches the baby, keeping most of it from the baby. There is a good explanation for this. While in utero, the baby is getting all of it's nutrients from the mother's whole body and having it deposited, by way of the umbilical cord (which attaches to the placenta on the mother's side). Because the nutrients come from the mother's own reserves, the placenta passes everything necessary to the baby before it is absorbed by the mother, because the adult mother can function and thrive on much less nutritionally than the fetus needs to properly grow. Therefore, because the baby needs the nutrients more than the mother does, the mother receives much less than 100% of the nutrients she ingests because the baby gets it before she does.
However, the baby after birth receives it's sustainence from the mother's milk, not from her own reserves of nutrients. The mother receives her nutrients from the food she eats, but creates the milk for the baby as his food. The mother needs nutrients in order to create the milk. Therefore, in order to effectively create enough nutritious milk for the baby, the lactating mother will absorb almost 100% of the nutrients she ingests, because the baby needs her to ingest it to make the milk.
The body is a mysterious but wonderfully efficient machine, don't you think?
Anyway, my point is that a breastfeeding mother taking LSD is nothing at all in comparison to a pregnant mother taking LSD, and also that the way the body metabolizes during breastfeeding may actually cause the LSD to break down faster than it would in a non-lactating adult, therefore in my opinion, I feel it would be safe to breastfeed after a day or so.
Keep in mind there is very little scientific fact here, only my musings as related to the information supplied, and I am not a doctor. Just because I think it would be OK doesn't mean I am telling anyone to do it
