Oxycodone, which is sold, among other things, under the brand name OxyContin, is an opioid drug used to treat moderate to severe pain. It is usually taken by mouth and is available in instant release and controlled release formulations.
Hydrocodone, sold under brand names such as Vicodin and Norco among many others, is a semisynthetic opioid derived from codeine, one of the opioid alkaloids found in the opium poppy. It is a narcotic analgesic used orally for relief of moderate to severe pain, but also commonly taken in liquid form as an antitussive/cough suppressant..
Tramadol is used to treat moderate to severe pain in adults. It comes as a tablet, and as an extended-release tablet or capsule to treat around-the-clock pain.
Xanax (alprazolam) is a benzodiazepine (ben-zoe-dye-AZE-eh-peen). It is thought that alprazolam works by enhancing the activity of certain neurotransmitters in the brain.