Final answer:
The statement that most institutional pharmacies are open 24 hours is false. While some may operate around the clock, especially in hospitals, not all institutional pharmacies maintain 24-hour operations.
Step-by-step explanation:
The statement 'Most institutional pharmacies are open 24 hours' is false. Institutional pharmacies, which typically serve healthcare facilities like hospitals and nursing homes, may have round-the-clock operations to meet patient needs, but not all are open 24 hours. Many of these pharmacies maintain business hours that coincide with the facility's peak operating hours or have on-call staff to handle off-hour medication needs. The availability can vary significantly depending on the institution's size, location, and patient requirements. While 24-hour access can be critical in hospital settings, it is not a universal standard for all institutional pharmacies.