NCLEX-RN Practice Test Nurses must be familiar with the American Nurses Association (ANA) Code of Ethics for Nurses. The nurse understands that which ethical principle is defined as the nurse’s duty to do no harm? Posted on March 10, 2022 by NCLEX.ME Nurse Fill in the blank. ______________ (Correct response: Nonmaleficence) Nonmaleficence is the ethical principle that states the nurse’s duty is to do no harm. NCLEX.ME Nurse View all posts by NCLEX.ME Nurse →