Vicodin is a prescription medication used to relieve moderate to severe pain. It combines two ingredients: **hydrocodone**, which is an opioid that helps block pain signals in the brain, and **acetaminophen**, which helps enhance the pain-relieving effects of hydrocodone and reduces fever. Vicodin is often prescribed after surgery or injury or for chronic pain conditions. It’s important to use Vicodin exactly as directed by your doctor to avoid side effects and potential dependence.