"have had 13 low back surgeries the oxycontin has helped me lead as normal life as much as possible, until they changed them. they don&#039;t work even near what the oc had. i now they say not to crush them but i  would crush one.dr put me to 4 80s three times a day.  to get to where i had been getting somewhat of a life back, i would crush one for breakthrough pain felt pretty good. now i am right back in bed 24hr a day,also noticed my body has been putting out a smell like burnt rubber,and sick to my stomach, have not had a bowl movement in 2 weeks .i told the dr i would give him all my oxycontin back to him to just get something else. so i will be changing."