Generic Oxycodone is a prescription opioid medication that doctors use to treat moderate to severe pain, especially after surgery, serious injuries, or in some chronic pain conditions. It works by attaching to opioid receptors in the brain and spinal cord, which reduces how strongly the body perceives pain, but it can also cause feelings of relaxation or drowsiness. Because it affects the central nervous system, oxycodone can have side effects such as nausea, constipation, dizziness, slowed breathing, and sleepiness, and these effects can be more serious if the medicine is not used exactly as prescribed.