When administering medications, under what conditions can controlled substances be in a patient's possession?

The reason why the option regarding administering medications or having an active prescription is correct lies in the legal and safety parameters surrounding controlled substances. Controlled substances are regulated heavily due to their potential for abuse and dependency.

When a patient has an active prescription for a controlled substance, it indicates that a qualified healthcare professional has evaluated their need for that particular medication, and it allows the patient to possess it legally for personal use as directed. Additionally, during the administration process, the medication is often under the supervision of healthcare personnel, ensuring that it is used safely and effectively.

The other contexts, such as being in a pharmacy, do not grant the same rights to patients to possess the medication independently. Expired medications are also not considered safe for possession or use, as they may no longer be effective or could potentially be harmful. Therefore, the possession of controlled substances is strictly regulated to ensure patient safety and compliance with healthcare laws.