My grandad is 96. About month and half he fell in his home during night and injured hipbone, but did not break it. Due to injury, he was forced to lie in bed. We engaged nurse to do exercises with him to avoid muscle atrophy. In the beginning, he was answering good to the treatment, but during the last week he simply denies any cooperation with nurse, sleeps most of the day, and takes very little food or drink. He is also much disoriented, has hallucinations, sometimes I think he can't make difference between reality and dream, and stories that he tells are morbid (about graves, some black and white horses...). Should I expect the worst? Can this behavior be due to the medications?