Anyone out there used Morphabond ER for chronic back pain and sciatica? My pain management Dr just put me on it (was on Opana ER) and I'm sick these first days. Weak, nauseous, diarrhea, trouble sleeping, very uncomfortable and the pain management isn't that great. How long will I feel sick like this? Anyone know out there??? My Dr. took me off Opana ER because it was taken off the market. The illicit drug users were abusing it. ## I'm really sorry about your situation. I was in a very similar one. I was also on Opana Er and was very happy with my pain control which took years to figure out just the right drug and strength. I was so upset when I walked into my pain clinic and they told me opana was no more. I couldn't believe they took it off the market because it was be...