Which of the following drug combinations would be appropriate for the patient with episodic abdominal pain?

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: A

Rationale: Fentanyl is a potent opioid analgesic that is often used for severe pain, including cancer-related pain. In this case, the patient's pain was initially relieved by ibuprofen but later required a stronger analgesic due to increasing pain intensity. Fentanyl's conversion to morphine in the body makes it a likely choice for managing the patient's continuous but moderate bone pain.

Correct Answer: C

Rationale: The symptoms described in the patient, such as nystagmus, difficulty concentrating, and a pounding heart, suggest overstimulation of the central nervous system. A Glutamate receptor antagonist would help counteract this overstimulation by blocking the excitatory effects of glutamate, providing immediate relief to the patient.

Correct Answer: D

Rationale: Naltrexone, an opiate receptor antagonist, was likely administered to the patient to facilitate avoidance from ethanol dependence, as research suggests that compulsive alcohol drinking is influenced by opiate receptor activity. Naltrexone helps reduce the rewarding effects of alcohol, making it easier for the patient to abstain from drinking.

Correct Answer: C

Rationale: The patient's presentation of agitation, diaphoresis, disorientation, mydriasis, unreactive pupils, and nystagmus is consistent with Phencyclidine (PCP) intoxication. PCP is known to produce hallucinations, altered mental status, and physiological effects similar to those described in the case, making it the most likely cause of the patient's signs and symptoms.