Buy Oxycodone 5mg Online is used to help relieve moderate to severe pain. It works in the brain to change how your body feels and responds to pain. Oxycodone belongs to a class of drugs known as opioid analgesics. The opioid painkiller oxycodone is also referred to as a narcotic. Pain ranging from moderate to severe is treated with oxycodone. The extended-release version of oxycodone should not be taken for pain on an as-needed basis but rather for 24-hour pain management.