Chapter 31: Psychiatric Emergencies

Psychiatric emergencies represent acute clinical situations in which disturbances of thought, mood, behavior, or cognition create imminent danger to the patient or others, necessitating rapid assessment and intervention to prevent serious harm or death. This chapter systematically examines the major categories of psychiatric emergencies, including suicidal ideation and attempts, violent or homicidal behavior, acute psychotic episodes, delirium, severe substance intoxication and withdrawal syndromes, neuroleptic malignant syndrome, serotonin syndrome, and malignant catatonia. Understanding the epidemiology of these presentations is essential, as psychiatric emergencies constitute a significant portion of emergency department visits and carry substantial morbidity and mortality risks when not promptly addressed. Risk stratification requires clinicians to identify predisposing factors such as major depressive disorder, bipolar disorder, schizophrenia, substance use disorders, as well as acute psychosocial stressors including bereavement, trauma, social isolation, and access to lethal means. The assessment process demands systematic triage, comprehensive psychiatric and medical history, corroboration from collateral sources, and thorough medical evaluation to identify or exclude organic etiologies underlying the acute presentation. Management centers on establishing immediate safety, achieving clinical stabilization, and treating the underlying cause or triggering condition. Suicidal patients require safety planning, intensive monitoring, psychiatric hospitalization when indicated, and pharmacologic management with agents such as antidepressants or mood stabilizers. Agitated or violent patients respond to graduated interventions beginning with verbal de-escalation techniques, environmental modifications, and judicious use of sedating medications including benzodiazepines and antipsychotics, with physical restraint reserved for situations where less restrictive options have failed. Acute psychosis demands antipsychotic administration and stabilization in an inpatient setting. Medical-psychiatric emergencies such as serotonin syndrome, neuroleptic malignant syndrome, and withdrawal delirium require immediate recognition and intensive medical management with coordination across multiple specialties. Legal and ethical dimensions are integral to emergency psychiatry, including evaluation of decision-making capacity, involuntary hospitalization procedures, informed consent, and protection of patient rights. Effective management fundamentally depends on multidisciplinary collaboration among psychiatrists, emergency medicine physicians, nurses, and social workers to deliver coordinated, timely intervention.