"i normally take generic opana (oxymorphone) 30mg and it works great for my pain. i can function good such as go to the store, light yard work, and enjoy family. but i recently got the brand name opana (endo) and it is awful. i&#039;m in so much pain and experiencing withdrawal symptoms. it&#039;s been 18 days and it is still like taking a placebo. my breakthrough oxycodone 30mg is the only thing keeping me out of the hospital. i&#039;ve been in bed 90% of the time since taking this endo brand. i think it&#039;s the amount of additive in the medication. "