Acetaminophen (the active ingredient in Tylenol) overdoses cause tens of thousands of ER visits and nearly half of acute liver failure cases in the U.S. Researchers are now testing whether an antifreeze antidote can help prevent liver damage when standard treatments arrive too late. Credit: Shutterstock Social media and news feeds are filled with unverified claims about a possible connection between acetaminophen and autism in children. But medical experts say the far more serious and well-