gmansmom,
your guess is correct that urocarb and urocholine are one and the same. urocarb is the name of the tablet, and urocholine is its active content.
for the moment, i'm trying once again going without it. i had changed how i took it (first thing in the morning, leaving the required half hour before breakfast - previously i took it just before going to bed), and noticed that i had no intuition or ability to see how to solve problems in mathematics. whether this was related to the fact that i had changed how i took my urocarb or that i had just spent three months forgetting everything after a bad semester at university i do not know, but since stopping taking it my mathematical abilities have increased (again, by stopping taking urocarbs or simply getting into the swing of things again, i don't know), and i haven't been aware of any significant falloff in any other abilities. so for the moment, i'm staying off it, but later in the year i will do a test on myself again to see what happens and whether or not it's worth it for me personally to be taking it.
of course, be sure to remember that your autistic son isn't the same as me, and could well acquire great benefits from urocarb whereas i do not. all you can do is test it.
lank