A Do Not Resuscitate (DNR) order is a medical directive instructing healthcare providers not to perform cardiopulmonary resuscitation (CPR) if a patient's heart stops or they stop breathing. DNR orders are typically requested by patients with terminal illnesses or serious conditions where resuscitation would be unlikely to succeed or would result in a quality of life the patient finds unacceptable. The decision to request DNR reflects individual values about end-of-life care. DNR orders require informed consent—patients must understand what they're declining and the implications. These orders are documented in medical records and, for use outside hospitals, may be indicated on bracelets or official forms that paramedics recognize. DNR orders don't affect other treatment—patients can still receive medications, surgeries, and other interventions. Terminology varies; some jurisdictions use "Allow Natural Death" (AND) or similar phrases.