I've take oxycontin for 10 years, and have felt sick for last few. After minor exertion, I just get an awful all over "bad"feeling, and like my life is drained out of me. I had heart stent put in March trying to get help for this, but they say it's not the heart. Now it's getting worse again. I'm on my feet only 15 min and My arms feel weak and I wish I could find the right way to explain how awful I feel. Even going to church, visit my mom... so that isn't anxiety. It's something physical. Could it be the pain med? Does anyone know what I'm talking about. I don't know what to do.