What characterizes a closed formulary in a pharmacy?

A closed formulary in a pharmacy is characterized by only including medications that are specifically listed in the formulary. This means that only those selected drugs are carried and available for dispensing, while other medications not included on the formulary are not available for use within that pharmacy. This type of formulary is often used to control costs and ensure that clinicians prescribe medications that have been vetted for efficacy, safety, and cost-effectiveness.

In contrast, a pharmacy with an open formulary would provide access to all medications upon request, which is not the case in a closed formulary system. Options indicating unlimited quantities or medications provided at no cost do not accurately describe the essence of a closed formulary, as the limiting factor of the formulary primarily relates to the selection of medications available for dispensation rather than quantity or cost structure.