Schizophrenia mental disorder. Consult!

My father is suffering from schizophrenia since I was not even born. Now I am 27 year old and my father is 60. He has become so violent and he keeps talking shouting all day. He has become so week because of his medicines which is prescribed by a local psychiatrist at Nainital. He is an educated man , he belives that he is some Avatar of God Rama or krishna. He says he will rule the entire world. He dreams of such things , and he says he listens the sound from the universe. He firmly believe that one day all the big leaders from government will come and give him the power to rule the world. We are very much frustrated. We have already expended a lot of money on his treatment. He had been admitted to mental hospitals 2-3 times earlier. These days he has become so much vulnerable and we are very scared. We are a middle class family and really don't know how to treat him. He even beats my mother and sister when he is drunk. He takes drugs as cigarette , alcohal a lot. I want to consult