One prescription medicine in the class of medications known as opioids is Norco. The main purpose of it is to treat moderate to severe pain. It lessens the sense of pain by attaching to opioid receptors in the brain and spinal cord. In meds like Vicodin or Norco, hydrocodone is frequently mixed with acetaminophen, a non-opioid pain reliever. This combo gives additional relief from fever and amplifies the pain-relieving benefits of hydrocodone. less