To alleviate severe pain, Hydrocodone 10-500 mg is used. Hydrocodone is primarily used for the care of people who can be treated with medication for lengthy periods to alleviate extreme pain and can not be treated with any other medications or procedures. Hydrocodone is in an opiate (narcotic) analgesic class of medicines. It functions by modifying the responses to pain in the brain and nervous system. Only information concerning Hydrocodone alone can be found in this monograph. If you take a Hydrocodone combination drug, please consult with your doctor or pharmacist for more information on all the components in a Hydrocodone combination monograph.