Opana ER is an extended-release form of the opioid medication oxymorphone. It's typically prescribed for the management of moderate to severe pain when continuous, around-the-clock opioid analgesia is needed for an extended period of time. However, due to its potential for abuse and addiction, it's usually reserved for cases where other pain treatments have been ineffective.

As with any opioid medication, there are serious risks associated with Opana ER, including addiction, overdose, and death, particularly if misused or abused. It's crucial to use this medication exactly as prescribed by a healthcare professional and to be aware of the signs of opioid overdose, such as slowed or difficult breathing, extreme drowsiness, and loss of consciousness.