Hydrocodone is a prescription opioid medication primarily used to relieve severe pain. It's often prescribed when other pain medications are not effective enough. Hydrocodone works by binding to opioid receptors in the brain and spinal cord, decreasing the perception of pain. It is typically combined with other substances such as acetaminophen or ibuprofen to enhance its effectiveness. Common brand names for hydrocodone-containing medications include Vicodin, Norco, and Lortab.