Bottles of Tylenol will soon have new red warnings on their caps to alert users to the potentially fatal liver damage that can occur by taking too much of the pain reliever. The unusual step comes as Tylenol maker Johnson & Johnson is facing a growing number of lawsuits related to the drug, as well as pressure from the federal government. The warning, which will make it clear that Tylenol contains acetaminophen, is designed to grab the attention of people who don't read the smaller warnings already on the bottle. Acetaminophen overdoses send 55,000 to 80,000 people to the emergency room in the U.S. each year and kill at least 500 of them due to liver failure, about half of those deaths accidental. While the drug is safe when used as directed, problems arise when people take more than the directed maximum dosage, or when they unintentionally take too much, such as taking Tylenol according to the proper dosage, but then also taking other products at the same time that they don't realize also contain acetaminophen, such as Nyquil or prescription pain killers like Percocet or Vicodin.