How do other illnesses affect Tylenol (acetaminophen) poisoning?

People who use alcohol regularly or to excess could experience increased risk of liver toxicity from Tylenol (acetaminophen) poisoning. Also, people who are already experiencing liver disease can be more at risk of further damage caused by Tylenol poisoning. In general, people take Tylenol and other acetaminophen medications to help with illnesses and conditions that cause pain, so if you have a condition for which you're taking acetaminophen tablets, be careful to read labels and take proper dosages to avoid accidental poisoning.