Hospital Pharmaceutical Formularies differ from Insurance Company Formularies [View all]
And they exist for a very different reason than cited in Mineral Man's thread, which is actually about Insurance Company formularies, not hospital and pharma formularies.
http://www.democraticunderground.com/?com=view_post&forum=1002&pid=4691362
From the NIH:
"...the most important purpose of a hospital formulary: listing the drugs of choice, as determined by their clinical efficacy and their relative safety, including adverse drug reactions, side effects, interactions, the potential for errors, and the risk of patient harm.
...Ideally, a carefully selected formulary guides clinicians in choosing the safest, most effective agents for treating specific medical problems."
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2730104/
Note that it does not include "Insurance Companies." In fact, it doesn't even mention insurance companies.
So they may apply some different definition, based on cost, but that is not what a formulary is intended to be.
edited to add link to referenced thread