Oxycodone and hydromorphone are prescription opioid medications used to treat moderate to severe pain, but they differ in strength and usage. Oxycodone is commonly prescribed for chronic or acute pain and is available in multiple oral formulations, including extended-release options. Hydromorphone is significantly more potent and is often reserved for severe pain or patients who do not respond well to other opioids. Both medications carry risks of dependence, tolerance, and respiratory depression. Hydromorphone may cause stronger effects at lower doses, while oxycodone offers more flexible dosing. The choice depends on pain severity, prior opioid exposure, and medical supervision.