There are several important aspects to knowing the history of psychiatry. Our field is one of rapid change, and the way we practice will be very different 10-20 years from now compared to what we do now.
For example, Henry Nasrallah (editor in chief of Current Psychiatry) mentioned paradigm shifts in psychiatry. After CATIE, several psychiatrists prescribed typicals with more frequency. Nasrallah mentioned recent data showing that atypicals, but not typicals confer neuroprotection in schizophrenia--> leading away from the typical paradigm.
He also mentioned data showing that more doctors should be open to the use of Clozaril.
The point is if you know why these trends occur, and why, you'll be a few notches above that psychiatrist who's psychotropic decision making alogorithm is no better than when he gradated residency--and he graduated 20 years ago. It further reinforces just how much we don't know, and encourages doctors to keep on top of the latest data.
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OK, now all that's been said, I'll also say I'm not a fan of several questions on the PRITE. If you crack open a Kaplan and Sadock board prep book, and look at the questions, there are several incompatibilities with that book's questions, the boards, and the way modern psychiatry is practiced.
In defense of the PRITE and K&S, there are several important things in psychiatry that will not be seen on an everyday, or even once a month or year basis that I feel are important in psychiatry. La belle indifference, wow, when you see it--man that's just impressive to see something like that, and you'll see it rarely, but to know it is important. The K&S book, and the PRITE do give several very good questions, they are written by people who know their material, but I also believe they are written on a mindset not in tune with what other feel are practical for psychiatry.
IMHO--better questions for the PRITE will focus on percentages of weight gain with specific meds, efficacy of the atypicals, SSRIs, etc in head to head comparison studies such as CATIE, grey area issues that are practical such as when to stop giving haldol during agitation--after 10, 20mg, 30mg?
E.g. have a graph chart with comparisons of the protein binding of all the SNRIs and SSRIs---> not match each one with the appropriate protein binding bar.
Someone may argue my approach is too easy. Maybe, but I've seen too many psychiatrists not know this material which may be "too easy". It seems odd to test on the esoteric stuff that is not used much when I see so many not know the easy stuff.
These are issues which would affect everyday practice, I've rarely seen psychiatrists make their own decisions on these issues, or if so, made them on anecdotal experience when there was plenty of evidenced based data for doing so.
If you're a PGY 1 or 2, focus on passing USMLE Step III first. Get it out of the way by PGY-2. Then focus on psychiatry. The PRITE and the board exam will test you on things that you will not learn simply by seeing patients all the time.