Recently, my father is becoming increasingly irrational. He has been shouting non-stop everyday about the self perceived injustices and grievances he experienced. I have tried many ways to cater to his needs, but he never seems satisfied. He often talks about selling the house and how his three children are useless and cannot take care of him. The money I give him never seems to be enough, as he spends it on various items which we already have in abundance. I feel terrible and worn-out. I start to think that my father may be experiencing some form of neurological degradation or cognitive impairment. May I know of any methods or approach that can solve this problem or perhaps just temporarily alleviate the situation?