A co-worker of Sean's relayed a conversation she had with her pediatrician about a study that came out in 2005 linking acetaminophen use (Tylenol) after vaccines to autism. I looked it up and so far can't find a 2005 study (well I can find this study called AVIS from 2006 but I can't find the results), but I did find a paper that came out in May of this year that shows this link with the MMR vaccine in particular. They surveyed parents and found that for children who became autistic only after vaccinations (i.e they showed no sign prior,) they were much more likely to have been given Tylenol after (or just before) their MMR vaccine. This is a correlation study so it isn't a causal link, but heck, it will certainly make me think twice about using Tylenol to relieve vaccine pain!! There was no link when ibuprofen was used. The study was published in the May 2008 issue of Autism;12(3):293-307( if you want to check it out). If I find the other study I'll keep you posted..