Yeah, me, too but I spent exactly six weeks working with acute dialysis
patients and hated every single minute of it.  It is common for people with
deteriorating kidneys to get mean when certain toxins build up in their
blood.  A little blood test might be in order...

Also, I interpreted this to mean that the person had undergone major
personality changes.  If he was a little mean, attention seeking and
verbally abusive before, it is one thing.  However, there are a host of
diseases, renal and otherwise, that can case radical personality changes.
If this is new behavior and not merely worsening of previous behavior, I
would have it checked out by a doc.

I once had a man admitted to the CCU from the psych unit.  After being
married for umpteen billion years, he pulled a gun on his wife at breakfast
for burning the toast.  Later in the day, he really began to deteriorate.
Turns out he had an MI that morning and his compromised heart sort of
stopped the elevator before it reached the top floor.  He did well,
eventually, and as best I know went home to be a perfect husband.  Of
course, word on the street has it that his wife has learned to make toast
without burning it so who knows.........

j