James,

For us that drug was nearly a miracle, and my mother in law acted more
"normal" on it than she had in ages.   BUT you have to be very careful to
watch the person's blood sugar on it.   It has been known to give the
patient high enough blood glucose readings that they are diagnosed as
diabetic.

In my mother in law's case that happened, but it was easily controlled with
diet and medications.   Another problem with it is that they lose their
balance more readily with it.   There are other side effects and dangers
with it as well, but if someone is really having delusions that are that
uncomfortable, it is a blessing, and worth it.

As I said earlier, everything is a tradeoff.   Our doctor prescribed (up to)
two tablets a day, and when things were really rough we did that, but we
found that by reducing it to one a day, she retained more of her abilities,
even though the delusions came back in diminished form.    So you have to
stay on top of the situation.

The really good thing about it is that it "kicks in" to effect rather
quickly, and you will probably see a calmer happier person within a day or
two.