Oxycodone is a prescription opioid pain medication used to manage moderate to severe pain when other treatments are not effective. It works by binding to opioid receptors in the brain and spinal cord to reduce pain signals and improve comfort. Because oxycodone carries risks such as drowsiness, constipation, slowed breathing, tolerance, and dependence, it is classified in the United States as a Schedule II controlled substance and requires a valid prescription from a licensed healthcare provider. Licensed online pharmacies may offer overnight delivery only after prescription verification and pharmacist review; offers bypassing these steps should be avoided for safety and legality.