It is unfortunate that your father is taking heavy amount of alcohol inspite of being diabetic.
With chronic alcoholism
can't be kept controlled.
His high liver enzymes are only due to consumption of alcohol.
He has to quit alcohol,if he has to become all right.
There is no other treatment for this condition except to leave alcohol and that too completely.
There is no medicine which can cure alcoholic hepatitis
He is sitting on a volcano as he is a diabetic,hypertensive,alcoholic and smoker.
If alcohol s not stopped now,it shall lead to cirrhosis
and then the situation would be irreversible.