Final answer:
The nurse should administer the meperidine in the specified dosage and route.
Step-by-step explanation:
The nurse should administer the meperidine in the dosage and according to the route specified by the physician's order. Meperidine is an opioid analgesic used for moderate to severe pain relief. It is commonly prescribed for elderly patients and can be safely used when the dosage and route are correctly followed.