Vicodin is a prescription medication that combines hydrocodone, an opioid pain reliever, with acetaminophen, a non-opioid analgesic. It is commonly prescribed to manage moderate to moderately severe pain. Hydrocodone acts on the central nervous system to reduce pain perception, while acetaminophen enhances its effects and helps reduce fever. Due to its opioid component, Vicodin carries a risk of dependence and should be used only under the guidance of a healthcare professional.