I broke a rib in a bad fall on cement stairs yesterday. It was not displaced. ER doc gave me a prescription for oxycodone. I know oxy is for pain, but I seem to be getting muscle spasms in my back that are excruciating. When I turn in a certain direction the pain just takes my breath way and I'm in the house just screaming in agony.Can I take both the oxy and a muscle relaxer together or is the muscle relaxer going to be better than the oxy? I only take one prescription drug, Simvastatin. I am 68 years old with no medical problems and extremely active.