I'm wondering what is up, last week I got a refill of my Teva Oxycontin ER 10 mg. My pain level has shot up. It just occurred to me, that it might have something to do with my pharmacy having to reorder my meds. Suddenly what was working great is doing NOTHING. Even tried taking a full day's dose at once, and still, felt nothing, I'm whining and complaining. I know my doc is so darn stingy, he's only giving me 40 mg. total a day in spite of 7 budging disks, DDD, AS, etc. he won't do a thing for me but more injections he's making a fortune on. Have they changed the formula? This is crazy, but I swear overnight it doesn't work at all anymore. :/ Anyone else experiencing this?