My Father-in-law is 94. He is still mobile and has a strong handshake. However, his understanding of situations than need to be addressed - are becoming more difficult for him mentally, especially changes that have to be made in his daily routine, such as now having a nurse dispense his meds; following Dr's instructions; complying with changes in regulations at his facility. It seems as if along with not understaning changes, he is also becoming more, and more, argumentative - not only with his family, but also with the staff at his facility. He is becoming increasingly more difficult to communicate with. Where is this headed? and what can we do, within reason, to deal with the worsening situation?