I have 15mg immediate release morphine sulfate pills. I was going to use them because I am in a pinch right now I ran out of my usual 30mg oxycodone hydrochloride pills and i dont want to go through withdrawals So i was going to take the 15mg morphine to get by but the script was filled 1/11/05 and expired 1/11/06. So my question is do prescription painkillers really expire? what will happen if I take them? Thanks!