What is an Oxycontin Oxycontin is a strong painkiller that was designed to relieve severe pain but also get you high. The drug works by dulling the senses, which results in a "high". The medication Oxycodone is a narcotic analgesic used to relieve moderate to severe pain in patients who have already been taking an opioid analgesic (opioid). It is only effective if it's taken as directed by a...