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Psychiatric history and mental-state examination

Essential points for quick revision.

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Danger or acute brain dysfunction

Severe agitation, stupor, delirium, catatonia, intoxication, withdrawal, rapidly changing consciousness, immediate suicidal intent or credible danger to another person requires urgent action before a routine interview is completed.

Action: Move to a safe setting, summon appropriately trained help, use ABCDE and bedside glucose, treat time-critical physical causes, reduce access to means and arrange continuous observation proportionate to the danger. Use the least restrictive response, record the legal basis for any restriction and obtain urgent senior psychiatric and medical review.

Synopsis

Obtain a collaborative psychiatric history, describe the mental state precisely, assess immediate risk and capacity, and integrate medical, neurological, substance, developmental and social explanations without turning observation into unsupported diagnosis.

  • Begin with the person's account and priorities, then establish a dated chronology of symptoms, function, treatment, physical health, substances, development, relationships and previous episodes.
  • Explain privacy and its limits before sensitive questions; use a professional interpreter and communication adjustments rather than relying on relatives to translate clinical or risk information.
  • The mental-state examination is a description made during the encounter: appearance and behaviour, speech, mood and affect, thought, perception, cognition, insight and judgement.

Key red flags

Fluctuating attention or arousal, disorientation, fever, hypoxia, head injury, seizure, focal neurology or a new medicine exposure suggests an acute medical or neurological syndrome rather than uncomplicated primary psychiatric illness.

Investigation priorities

01
Initial clinical interview and chronologyFirst step

Define symptoms, course, context, impairment, previous episodes, treatments and the person's goals.

Management branches

Opening sequenceEngage, orient and obtain the story

A person presents for psychiatric assessment in any clinical setting.

  1. Check immediate physical safety, privacy, communication needs and whether another person should be present before beginning a broad invitation.
  2. Build a dated account of symptoms, function, context, treatments and previous episodes, moving from open questions to focused clarification.
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Sources and review status4 sources · checked 27 Aug 2026 · clinical review pending
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom