 Many medicines used to treat colds and flu contain acetaminophen, a pain reliever and fever reducer found in hundreds of over-the-counter and prescription medicines. But taking too much or more than one medication containing acetaminophen per day can damage your liver. So always read the label and don't take acetaminophen if you drink three or more alcoholic drinks every day. To learn more, visit FDA.gov slash OTC pain info. A message from the U.S. Department of Health and Human Services Food and Drug Administration.