Opana ER 5 mg is used to treat chronic or acute pain. You can Buy Opana ER 5mg online is the best way to get this medicine in your home. Sometimes medicine is not available at stores you can order from this site and get it without prescription. You have to take this medicine orally without food every 12 hours. The first portion of the Opana trauma center's 5 mg pills are exhorted for patients who are not lenient on opioids.