A nurse is reinforcing teaching with the family of a client who is receiving palliative care for terminal cancer. Which of the following guidelines should the nurse emphasize about appropriate pain control measures?

Administer pain medication on a regular schedule.

Administer pain medication with caution to avoid addiction.

Administer a placebo if it is not time for pain medication.

Administer scheduled doses of medication from a patient-controlled analgesia (PCA) pump.