Are you dealing with severe pain?? Buy Opana ER online with exciting offers from trusted brands. Opana ER works on the brain and central nervous system (CNS) and makes you feel relief from your severe pain. It is the extended-release variant of Oxymorphone. It comes in 2 different dosages according to its intensity. Extended-release tablets are the best options for severe pain because they are taken once a day and work for the whole day. Though it is the best medicine for pain it has some side effects also. Side effects like headache, blurry vision, nausea, dry mouth, and itching may occur which go away after some days.