the oral BA is quite poor for oxymorphone. nasal and plugging are better routes, while IV provides 100% BA. i would suggest listening to your doctor and following his directions on what he wants you to take and do. if he wants you on the opana, then do it and be greatful you have pain medication as many people dont have the opportunity or dont have the money to pay for the meds. if i were you, i would just swallow the pills, abusing them might seem fun, but it's really just fruitless. your tolerance raises as you chase the high and as a result, you won't get effective pain treatment from the opana. remember that pain meds are for pain management, they are there to help you deal with the pain and do not completely take away the pain (atleast in most cases)