Welcome to HCM. I am Dr Anshul Varshney. I understand your concern.
Treatment would depend on the cause of liver dysfunction.
In case he consumes alcohol, these problems might be related to Alcoholic Liver Disease
I would advise you following investigations:
2. Liver Function Test
4. Kidney function test.
In case he is vomiting continuously, he should be admitted, and treated.
You might give him a combination of Pantoprazole
stat dose for vomiting.
This is my personal opinion for you based on available details. If you have any further query please ask me.
Dr Anshul Varshney, MD