I believe it's safe to say that a geriatric psychiatrist ought to know dementia, even though many of them don't. I don't think you necessarily do, and it would be impractical because in the current climate you cannot train so many subspecialists. I believe that the average geriatric psychiatrist ought to be able to handle the complexity of the issues related to Alzheimer's disease. Dementia specialists can be used on a referral basis, and this includes not only problems with management, but also problems with diagnosis. Dementia is a broad term-there are all kinds of dementias.
Some dementias respond to certain medications better than others.
Some people with dementia have distinct side effects to psychotropic medications. There are people who are well trained in the treatment of dementias, and it's an emerging field. Every year very interesting things come out. There is a debate going on right now, actually, about whether a geriatric psychiatrist should know all of this or if we need to have people who are more specialized in dealing with dementia. Especially as our society ages.