Opana ER belongs to a class of medications known as opioid analgesics. Its extended-release design allows the medication to be released slowly into the body, helping maintain consistent pain relief throughout the day and night. This makes it suitable for patients who experience ongoing pain that cannot be effectively managed with non-opioid medications or short-acting pain relievers. Buy Opana ER Online That is typically prescribed to patients who are already opioid-tolerant, meaning their bodies have adjusted to opioid therapy under professional guidance. It is not intended for occasional or as-needed pain relief.