Opana belongs to the class of medications known as opioid analgesics. These drugs function by binding to specific receptors in the brain and nervous system to reduce the perception of pain. Oxymorphone, the active ingredient in Opana, is more potent than morphine, providing significant pain relief even in small doses. It is typically prescribed for chronic pain conditions that require an opioid analgesic around the clock.

Opana is highly effective in managing moderate to severe pain, making it a valuable option for patients with chronic pain conditions.