I had no intention of returning to the forum this quickly but your cry for help couldn't be ignored. On regards to Oxycontin.... It is a very addictive substance. This comes from my own experience not to mention other side effects Oxy causes weight loss, sleepiness, loss of appetite and unsteadiness when you walk. In your father's case the shock of the fall may be his problem or it could be nerve damage which is hard to detect . If, as you say, he has had a complete examination xrays and such, I think the next move is to get your doctor to recommend a neurologist in case of nerve or possible brain damage. The sooner the better. Hope this helps
Further to my last post, age may have something to do with it also. At our age any type of accident can be traumatic. Talk to him , talk to him a lot. Do not keep him cooped up, get him outside where it is bright and sunny. Keep him focused on life and not his mortality. Sometimes when accidents happen, especially at our age, we think we hear the flapping of angel's wings and that can put us into a depressive state. This, I have once had experience with, so I know what I am saying. Good luck. I will be reading here but I am taking my leave for now and will not be answering for a while.