What is Tylenol with Codeine #4 (acetaminophen and codeine)?
Codeine is in a group of drugs called narcotic pain relievers. Acetaminophen is a less potent pain reliever that increases the effects of codeine. The combination of acetaminophen and codeine is used to relieve moderate to severe pain. Acetaminophen and codeine may also be used for other purposes not listed in this medication guide.