The Nurse Assesses a Postoperative Patient Who Is Receiving Morphine

The nurse assesses a postoperative patient who is receiving morphine through patient-controlled analgesia ( PCA ) . Which information is most important to report to the health care provider?

A) The patient complains of nausea after eating.
B) The patient's respiratory rate is 10 breaths/minute.
C) The patient has not had a bowel movement for 3 days.
D) The patient has a distended bladder and has not voided.