Dealers sell hydrocodone under the street names Norco, Hydro and Vikes, the latter of which refers to Vicodin, a brand-name drug that contains hydrocodone. Many doctors will only prescribe this drug for those with severe pain caused by disease or injury. Abuse occurs whenever the medication is used at a dose other than as recommended by a doctor. Signs and symptoms of hydrocodone abuse are not always easy to spot because these changes vary from person to person.