I had the toxic ammonia levels and never once did anyone test me until I told my Dr. I was seeing worms in my cat's poop as I laughed. She said that I had to get an ammonia test and it didn't matter if I fasted. The longer you are on depakote your ammonia levels can do what mine did because it keeps building up. I was wondering shouldn't this be tested regularly instead of when you show you are fighting off a coma? I passed out several times per day and had a mystery illness. I just don't want others to suffer like I did and I know others have had to gone through this as well. Many don't know they have this poisoning.