"i have to say, the ir&#039;s work much better than the er&#039;s for me. i take 6 - 10mgs per day. i used to be on many other things for pain such as oc 80&#039;s and ms 100&#039;s but the roller coaster leveled right out as soon as i started the opana and the pain leveled also. everyone is different and everyone&#039;s pain is different so suggesting a certain pill is hard for me to do. hope if you are given these, best of luck with your pain as they worked for me."