Vicodin is a prescription medication that contains a combination of two active ingredients: hydrocodone and acetaminophen. Hydrocodone is an opioid analgesic, while acetaminophen is a non-opioid pain reliever. Vicodin is primarily used for the management of moderate to severe pain.

Hydrocodone, as an opioid, works by binding to opioid receptors in the brain and spinal cord, reducing the perception of pain. Acetaminophen enhances the pain-relieving effects of hydrocodone and may also provide additional relief on its own.