There was a thread on here awhile back about Tylenol and the frequency with which it's used in suicide attempts and how many medications contain acetaminophen. Some posters said that there should be a national campaign. http://www.tylenol.com/getreliefresponsibly/index.jhtml
Site users can enter their medications and find out if they contain acetaminophen, even telling users how to read medication labels. It also has a section on "Acetaminophen and the Liver," mentioning that taken in excess, acetaminophen "may cause severe liver damage."