In a psychiatric emergency, the first step is to ensure the patient's safety and those around them. The PMHNP should first assess the patient's airway, breathing, and circulation (ABCs) and provide emergency medical treatment as needed. This is crucial, as many psychiatric emergencies are related to underlying medical conditions or substance-use disorders.
Once the patient is stabilized, the PMHNP can proceed with further assessment and management of the psychiatric emergency. One-third of medical conditions present with psychiatric manifestations.

Nephrogenic diabetes insipidus is a known adverse effect of lithium therapy. It is a condition characterized by an inability of the kidneys to respond to antidiuretic hormone (ADH), resulting in excessive urine output and dehydration. The nurse practitioner should closely monitor the patient's fluid and electrolyte levels and educate the patient about the signs and symptoms of this adverse effect.

Primary prevention is aimed at decreasing the number of new cases of mental disorders. An example of primary prevention is D.A.R.E. programs in elementary and middle schools.
Tertiary prevention is aimed at decreasing the disability and severity of a mental health disorder. Providing social skills education for a group of intellectually disabled teenagers is an example of tertiary prevention.
Secondary prevention is aimed at decreasing the number of existing cases of a mental disorder. Examples of secondary prevention include telephone hotlines, crisis intervention, and disaster response.

Serotonin is a neurotransmitter that is widely believed to play a role in regulating mood, anxiety, and other emotional states. In individuals with depression and anxiety, it is commonly thought that there is a serotonin deficiency in the brain. This deficiency may lead to various symptoms, including low mood, decreased motivation, sleep disturbances, and increased anxiety.
Antidepressant medications, such as selective serotonin reuptake inhibitors (SSRIs), are designed to increase the availability of serotonin in the brain and are widely used to treat depression and anxiety.

Mediation is a process used to resolve conflicts and disputes between two or more parties. In the context of mental health care, mediation can be an effective strategy for resolving conflicts between patients, family members, and healthcare providers. Mediation involves a neutral third party who helps facilitate communication and negotiation between the parties involved.