The Patient Has a Patient-Controlled Analgesia (PCA) Pump Following Surgery

The patient has a patient-controlled analgesia (PCA) pump following surgery. The nurse keeps naloxone (Narcan) in the patient's room as per protocol. What does the nurse recognize as the rationale for this protocol?

A) Naloxone (Narcan) enhances the effect of the opioid in the patient-controlled analgesia (PCA) pump and increases analgesia.
B) Naloxone (Narcan) is the antidote if an anaphylactic reaction to the opioid in the patient-controlled analgesia (PCA) pump occurs.
C) Naloxone (Narcan) is available to treat any systemic side effects, like constipation, of the opioid in the patient-controlled analgesia (PCA) pump.
D) Naloxone (Narcan) will reverse the effects of the narcotic in the patient-controlled analgesia (PCA) pump if an overdose occurs.