The long running radio show, "This American Life" has done a thoughtful report on the dangers of using the active ingredient in Tylenol, acetaminophen. They highlight the dangers of the drug that has always been advertised as "the safest", and how decades passed without proper warnings to the 50 million people who take the drug every week in the United States. The show's title: "Use Only As Directed"
You can listen for free at: This American Life

Be careful, once you start listening to this, you won’t want to turn it off until its over!