Final answer:
When an Emergency Dispensing Kit containing controlled substances is opened, a pharmacist must be notified within a certain time frame which can vary based on local regulations but must be done promptly.
Step-by-step explanation:
The subject of this question pertains to the procedures around the use of an Emergency Dispensing Kit (EDK) which contains controlled substances in a medical setting. Typically, the regulations for dispensing controlled substances are strict to ensure accountability and patient safety. When an EDK is opened, it's essential to comply with policies that likely include notifying a pharmacist or other responsible party within a specific, predefined time frame to maintain proper records and oversight. While the exact time frame can differ based on local regulations or institutional policies, promptly informing a pharmacist is crucial for legal compliance and monitoring potential adverse drug events.