Patient Education on PCA Morphine Use

A nurse is preparing to administer a patient-controlled analgesia (PCA) system with morphine to a postoperative patient who has been experiencing sever...

The healthcare provider instructs the nurse to educate the patient about using the PCA effectively. The nurse understands that while PCA provides effective pain relief, the patient requires knowledge and safety considerations to prevent overdose or complications.

Considering the mechanisms of action related to morphine and patient education, which of the following statements is critical for the nurse to include when instructing the patient on the use of morphine PCA?