Does anyone know the answer to this question??? I tried to look it up on the internet, but couldn't quite understand the chart. I went from 80mg of Oxycontin, 3 times a day to 40mg of Opana ER, 3 times a day. This month my doctor changed me to the patch from the Opana ER. He started me out on the 50mcg patch and told me to try it for a few days. If I needed more to call him and he'd give me another 25mcg patch till next month, then just give me the 75mcg patch. Somehow, I'm afraid I'm right in the middle of these two strengths and I don't want to take more than I need or than I was on. So far, I'm not doing very well on the 50mcgs patch, but I love how easy it is. I really would appreciate an answer if anyone knows... Thanks...