He is suffering from Acute Viral Hepatitis
At these levels of liver enzymes he requires admission if he is not admitted.
Its important to keep a watch on his coagulation profile, PT/INR.
You need to see any alterations in his level of consciousness like day time or excessive sleeping a spectrum of hepatic encephalopathy
He should be given high carbohydrate
and low protein diet
at this time.
He shouldn't get constipated in any case.
He may require bowel wash and lactulose.
If he is not admitted, I advise you to get him admitted to the earliest.