Psychiatric-Mental Health Nursing Phenomena of Concern include the promotion of optimal mental and physical health and well-being and prevention of mental illness, impaired ability to function related to psychiatric, emotional, and physiologic distress, alterations in thinking, perceiving, and communicating because of psychiatric disorders or mental health problems, behaviors and mental states that indicate potential danger to self or others, emotional stress related to illness, pain, disability, and loss, symptom management, side effects, or toxicities associated with self-administered drugs