Oxycodone 15mg is a semi-synthetic opioid analgesic derived from thebaine, an alkaloid found in the opium poppy. It is used primarily for the relief of moderate to severe pain and is prescribed when non-opioid analgesics or weaker opioids are insufficient. The 15mg strength is considered a moderate to high dose and is typically reserved for individuals who have developed some opioid tolerance or require more aggressive pain management.