I am trying to change from Oxycontin to MS Contin, but after 3 weeks, I'm not feeling so hot. I'm afraid the MS contin is causing irregular heart flutter and I just don't feel right. I hate to give up, but wondered if anyone knows if the Oxycontin original formula is being produced under any other names? Or if anyone might have more insight into medication switch. I was on oxycontin for 10 years, could it be my brain needs more time to adjust? Pain is not doing well either... I don't know what to do. I feel more depressed than ever and it is scaring me