I have been on oxycontin 30mg's 3 times a day (1-10 & 1-20 Brand Name). I am on the brand name time release tablet's for a long time from a bad car accident and numerous surgeries, The last 2 time I picked up my pills at the pharmacy I noticed the lettering on the pills were different instead of OC and the mg it had and OP. I asked the pharmacist and they said the the company changed the ingredients because of all the trouble with people abusing them but I informed them that this new one is making me sick to my stomach and getting headaches. It does seem reasonable about changing the formula but not the letters and all of a sudden getting nausea's and having headaches. Could you let me know if this is true or if I am getting the wrong medicine. Thank You Ron