Hello, Rainbow Dash, and welcome to the forum. I am sorry that your brother is so sick. His mental symptoms are undoubtedly from high ammonia levels in his brain. He does need to take the Lactulose and possibly also have it increased. The first thing that needs to be done when he gets out is to hook him up with a hepatologist for evaluation and treatment, unless he will be transferred to hospice outside prison, in which case there will be no treatment except for comfort measures. Liver disease is such an individual thing that it's impossible to say how much time he has left. It's very important that he not drink alcohol or ingest illegal drugs, or even OTC drugs unless approved by a doctor. I suggest you read the info in the folder entitled Hepatitis Resources at the top of the page. There is a lot of information in there about
end stage liver disease, the various stages, etc.