Opana is a brand name for the medication oxymorphone, which is a potent opioid pain reliever. It's typically prescribed to manage severe pain, often in cases such as post-surgery or cancer-related pain. Oxymorphone, like other opioids, works by binding to opioid receptors in the brain and spinal cord to reduce pain perception. This medication comes in different types of tablets like 5mg, 7.5mg, 10mg, 15mg, 20mg, 30mg, and 40mg. Because of its potency, Opana has a higher risk of dependence and potential side effects compared to less potent pain relievers. It should be used under the close supervision and direction of a healthcare provider. Patients should follow their doctor's instructions carefully and be aware of the risks associated with opioids when taking Opana.