Click here: https://bigpharmausa.com/pain-relief/opana-er-5-mg/ Opana ER is an opioid medication used to treat moderate to severe pain. Before buying Opana ER 5mg online, be sure to thoroughly read this medication handbook. The extended-release version of oxymorphone, marketed as Opana ER, is designed to provide continuous pain relief throughout the day and night; it should not be taken on an as-needed basis. Opana ER may be used for applications that are not covered by this medication guide. If you have any queries about the treatment you get at your nearest pharmacy, ask the pharmacist.