Opana ER (Oxymorphone) 5mg is an extended-release medication used for managing severe pain. You can now purchase Opana ER online with our right-on-time delivery service. At Careskit Pharmacy, we ensure that your order is processed quickly and securely, so your medication arrives exactly when you need it. Opana ER, also known by its generic name oxymorphone extended-release, is a potent opioid medication prescribed for the management of moderate to severe pain when around-the-clock pain relief is necessary. It belongs to a class of drugs called opioid analgesics, which work by binding to specific receptors in the brain and spinal cord, reducing the perception of pain.