Also, a quick alert to pregnant women in case you didn't hear about this today: acetaminophen exposure during pregnancy has been linked to ADHD, but it just slightly increases the risk. Here's an article from Reuters. Yes I took a LOT of acetaminophen during my pregnancy and I still take it now that I breastfeed. It helped my head (when it decided to work) which lowered my tension and in turn was better for the baby, and if I could have avoided taking it I would have. Which makes this quote from the article hilarious:
Nevertheless, "it's reasonable to say that there's no reason to use these drugs during pregnancy unless there is a clear medical indication," said Olsen, a professor of epidemiology at UCLA and at Aarhus University in Denmark.
Because, ya know, pregnant ladies generally take acetaminophen just for fun. ;)