Hello! According to what you have described, it appears that-
1) The general condition of your father is deteriorating
2) The occurrence of persistent hiccups may be due to increased blood urea levels
3) The altered level of sensorium points to a poor prognosis
4) He might progress to hepatic encephalopathy
or acute renal failure
5) He needs urgent hospitalization for proper management, if he is being managed at home at present.
Thanks! & my best wishes to him for possible recovery.