A nice-guy cop with Dissociative Identity Disorder must protect a woman on the run from a corrupt ex-boyfriend and his associates.
 
No review.  Just a quote from the movie.
 
[Charlie takes his medication at the Massena Police Station]
Irene P. Waters: What are those for?
Charlie Baileygates: Oh! It's just this stupid thing. I have to take a pill every six hours or I feel... funny. No big deal.
Irene P. Waters: What's it called?
Charlie Baileygates: Advanced delusionary schizophrenia with involuntary narcissistic rage.
 
Nuff said.
 
FUN FACT:  Jim Carrey ad-libbed the moment when he asks his sons to kiss him before he leaves. One of them looks obviously surprised.