Acute Agitation and Behavioral Emergency

Acute agitation refers to a state of excessive motor and verbal activity, often accompanied by irritability, distress, and unpredictability, that can escalate to a behavioral emergency posing risk of harm to the person or others. It can result from a wide range of underlying causes — psychiatric illness, substance intoxication or withdrawal, an underlying medical condition including delirium, or a combination — and requires prompt, careful assessment to identify the cause and ensure safety.

Acute agitation is not a single DSM-5 diagnosis but a clinical presentation and behavioral emergency that can occur across many underlying psychiatric and medical conditions, characterized by escalating restlessness, irritability, and potentially aggressive or unpredictable behavior that poses a risk to the safety of the person or those around them, requiring urgent assessment and de-escalation.

Causes include underlying psychiatric conditions (acute psychosis, mania, severe anxiety or panic, agitated depression), substance intoxication (particularly stimulants or alcohol) or withdrawal (alcohol and benzodiazepine withdrawal are especially dangerous), an underlying medical cause such as delirium or pain, and situational factors such as overwhelming environmental stimulation or unmet needs, particularly in someone with dementia or intellectual disability.

• Underlying psychotic or bipolar disorder
• Substance use or withdrawal
• Dementia or delirium
• History of previous agitation or aggression episodes
• Untreated pain or discomfort
• Overstimulating or unfamiliar environments
• Communication difficulties — including autism, intellectual disability, or aphasia after a stroke — that make it hard to express distress or needs verbally

Acute agitation reflects an overwhelmed state of the brain's stress and threat-response systems, whether driven by primary psychiatric illness, a substance's direct pharmacological effect, or an underlying medical or delirium process disrupting normal brain function broadly. Regardless of the specific cause, the common final pathway involves impaired capacity for the prefrontal cortex to regulate and calm more primitive threat-response systems, driving escalating, poorly controlled behavior.

• Restlessness, pacing, and inability to sit still
• Raised voice, or pressured, rapid speech
• Irritability and low frustration tolerance
• Escalating verbal hostility or threats
• In severe cases, physical aggression toward objects, self, or others
• Difficulty being redirected or calmed with usual reassurance
• Accompanying confusion, hallucinations, or disorientation depending on the underlying cause

• Not a formal diagnostic category itself
• Assessment focuses on identifying the underlying cause — psychiatric, substance-related, medical/delirium, or situational — through history, examination, and collateral information where safely possible
• Immediate safety for the person and those around them is assessed simultaneously

Conditions a psychiatrist will consider and rule out before confirming this diagnosis:

Delirium

Agitation with fluctuating attention and cognitive disturbance, usually with an identifiable acute medical cause.

Acute psychotic episode

Agitation driven by hallucinations, delusions, or disorganized thinking.

Manic episode

Agitation with elevated mood, grandiosity, and decreased need for sleep.

Substance intoxication or withdrawal

Temporal relationship to substance use, with characteristic physical signs depending on the substance.

Anxiety or panic

Agitation driven by intense fear and physical panic symptoms, generally with preserved orientation and reality testing.

Pain or an unmet physical need

Particularly relevant in individuals with communication difficulties such as dementia, intellectual disability, or young children.

• Rapid but careful assessment prioritizing immediate safety
• Vital signs and basic medical screening to identify or exclude an underlying medical cause, including delirium
• Blood glucose and oxygen saturation checks
• Substance use history and, where clinically relevant, toxicology screening
• Collateral history from family or caregivers when the person cannot reliably provide it themselves

De-escalation techniques — calm, non-confrontational communication, reducing environmental stimulation, offering choices and a sense of control — are the first-line approach and should be attempted before medication in most situations. Addressing any underlying identifiable cause is essential, and medication is used when de-escalation alone is insufficient and there is significant risk to safety.

Antipsychotics (oral or short-acting injectable when necessary)

Used for agitation associated with psychosis or mania.

Benzodiazepines

Particularly for agitation related to anxiety or alcohol withdrawal, or when a rapid calming effect is needed.

De-escalation and calm communication techniques

Central in the acute moment.

Treatment of the underlying condition

Psychiatric treatment, substance use treatment, or dementia care planning once the acute crisis has resolved.

Family and caregiver training

Recognizing early warning signs and de-escalation techniques to help prevent future escalation.

• Identify and reduce personal or environmental triggers where a pattern is recognized
• Ensure consistent treatment of any underlying psychiatric or medical condition
• Maintain structured routines, particularly for individuals with dementia or communication difficulties
• Develop a personalized crisis or de-escalation plan with a treating clinician for those with a history of recurrent episodes

Outcomes depend heavily on identifying and appropriately treating the underlying cause. Many episodes resolve well with prompt, appropriate assessment and de-escalation, while recurrent agitation, particularly without an identified or treated underlying cause, can significantly affect quality of life and caregiving relationships.

• Consistent treatment adherence for any underlying psychiatric condition
• Prompt treatment of pain or discomfort, particularly in individuals with communication difficulties
• Environmental modifications to reduce overstimulation for those prone to agitation
• Caregiver education in early warning sign recognition and de-escalation techniques
• Addressing substance use proactively rather than only during a crisis

Remain as calm as possible, since a calm presence can help de-escalate the situation, while an anxious or confrontational response tends to escalate it further. Avoid arguing, correcting, or physically restraining unless there is an immediate safety necessity. Reduce environmental stimulation where possible, and check for unmet needs (pain, hunger, needing the bathroom) as a possible underlying trigger, especially in someone with dementia or a communication difficulty. Know when a situation has moved beyond what can be safely managed at home and requires emergency services.

1. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, 5th Edition, Text Revision (DSM-5-TR).
2. American Association for Emergency Psychiatry. BETA de-escalation guidelines.
3. National Institute for Health and Care Excellence (NICE). Violence and aggression: short-term management.