Vicodin is a prescription medication that combines hydrocodone, an opioid pain reliever, with acetaminophen, a common non-opioid analgesic. It is typically prescribed for moderate to severe pain when other treatments are not sufficient. Because hydrocodone affects the central nervous system, Vicodin carries risks such as drowsiness, dependence, respiratory depression, and potential misuse. The acetaminophen component can also affect the liver if taken in high doses or combined with alcohol.