Oxycodone can be a powerful analgesic. It is prescribed primarily to treat moderate to severe levels of pain. Oxycodone is a pain reliever that works by affecting the central nervous systems and changing the brain’s response to pain signals.Oxycodone can be purchased in various strengths to meet the individual needs of patients. Available dosages include 5mg or 10mg tablets, as well as 15mg and 20mg capsules.