A patient complains of 7 out of 10 abdominal pain and requests additional opioids. Current vital signs are heart rate 50, blood pressure 91/72, respiratory rate 11/min, and oxygen saturation 93% on 3 L nasal cannula. The patient has received all scheduled and PRN pain medications and you explain that their vital signs do not support further medication due to the risk for harm. What ethical principle is being upheld in this interaction?

Fidelity
Beneficence
Autonomy
Justice