The Nurse Administers a Narcotic for Pain to a Terminal

The nurse administers a narcotic for pain to a terminal patient with end-stage pulmonary disease and dementia. After one hour, the patient exhibits facial grimacing and restlessness. How should the nurse interpret these assessment findings?

A) The patient has continuing pain.
B) The patient is experiencing a sleep disorder.
C) The patient requires comfort measures.
D) The patient assessment is is within normal limits.