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Psych TopicsEmergency psychiatry

Psych · Emergency psychiatry

Acute agitation and rapid tranquillisation

Also known as Rapid tranquillisation · Rapid tranquilization · Acute agitation · Behavioural emergency · Severe behavioural disturbance · Chemical restraint · Emergency sedation psychiatry

Exam-exhaustive fellowship topic on acute agitation and rapid tranquillisation — de-escalation first, capacity and least-restrictive legal principles, oral-then-IM ladders with named doses (lorazepam, midazolam, promethazine, haloperidol, olanzapine, aripiprazole, droperidol), never IM olanzapine plus parenteral benzodiazepine, post-RT monitoring, TREC and Project BETA evidence, BAP/NAPICU principles, special populations. FRANZCP-primary, globally tagged.

high18 referencesUpdated 26 July 202614 min readVerification in progress

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Target exams

FRANZCPMRCPsychABPNMD-DNBNEET-SS

Red flags

  • Fever, fluctuating attention, hypoxia, or hypoglycaemia with agitation — medical emergency first, not primary psychiatric RT
  • IM olanzapine plus parenteral benzodiazepine — never co-administer; profound respiratory depression risk
  • Extreme continuous agitation with hyperthermia or collapse risk — severe behavioural disturbance needing medical resuscitation capacity
  • Prolonged prone restraint — positional asphyxia and sudden death risk
  • Post-RT unrousable patient or falling SpO2 — treat as airway emergency, not 'settled'
  • Akathisia misread as agitation leading to more antipsychotic — stop and treat the side effect
  • QTc prolongation or high cardiac risk before high-dose butyrophenones without ECG review
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Your progress

Saved on this device.

Target exams

FRANZCPMRCPsychABPNMD-DNBNEET-SS

Red flags

  • Fever, fluctuating attention, hypoxia, or hypoglycaemia with agitation — medical emergency first, not primary psychiatric RT
  • IM olanzapine plus parenteral benzodiazepine — never co-administer; profound respiratory depression risk
  • Extreme continuous agitation with hyperthermia or collapse risk — severe behavioural disturbance needing medical resuscitation capacity
  • Prolonged prone restraint — positional asphyxia and sudden death risk
  • Post-RT unrousable patient or falling SpO2 — treat as airway emergency, not 'settled'
  • Akathisia misread as agitation leading to more antipsychotic — stop and treat the side effect
  • QTc prolongation or high cardiac risk before high-dose butyrophenones without ECG review
The one-line answer

Agitation is a behavioural emergency, not a diagnosis — so the first move is always the same: secure the scene, run ABCDE and a glucose, exclude the medical mimics, de-escalate, and offer oral medication. Reach for a single IM agent only when danger is imminent and nothing else has worked. Never give IM olanzapine with a parenteral benzodiazepine, monitor every 15 minutes for at least 1 hour, and document capacity and the least-restrictive legal path. The endpoint is calm and rousable — never unconscious.[1][2][3]

Meet the patient

A 29-year-old man is brought to the emergency department by police after smashing windows and threatening his neighbours. He is pacing, fist-clenched, shouting that people are trying to kill him. He has not slept in four days. His obs: T 38.1, HR 124, BP 168/104, SpO2 98 percent, glucose 5.2. No one knows his medications.[4][18]

The nursing shift leader asks the only question that matters in the next ten minutes: is he safe to assess, and if not, what do you reach for? This whole topic is the disciplined answer to that question — the ladder, the doses, the one combination you never make, and the monitoring that stops a sedation becoming a cardiac arrest.[1][3]

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References18ShowHide
  1. [1]Patel MX, Sethi FN, Barnes TR, et al. Joint BAP NAPICU evidence-based consensus guidelines for the clinical management of acute disturbance: De-escalation and rapid tranquillisation J Psychopharmacol, 2018.PMID 29882463
  2. [2]Richmond JS, Berlin JS, Fishkind AB, et al. Verbal De-escalation of the Agitated Patient: Consensus Statement of the American Association for Emergency Psychiatry Project BETA De-escalation Workgroup West J Emerg Med, 2012.PMID 22461917
  3. [3]Wilson MP, Pepper D, Currier GW, et al. The psychopharmacology of agitation: consensus statement of the american association for emergency psychiatry project Beta psychopharmacology workgroup West J Emerg Med, 2012.PMID 22461918
  4. [4]Nordstrom K, Zun LS, Wilson MP, et al. Medical evaluation and triage of the agitated patient: consensus statement of the american association for emergency psychiatry project BETA medical evaluation workgroup West J Emerg Med, 2012.PMID 22461915
  5. [5]Huf G, Coutinho ES, Adams CE, et al. Rapid tranquillisation in psychiatric emergency settings in Brazil: pragmatic randomised controlled trial of intramuscular haloperidol versus intramuscular haloperidol plus promethazine BMJ, 2007.PMID 17954515
  6. [6]Raveendran NS, Tharyan P, Alexander J, et al. Rapid tranquillisation in psychiatric emergency settings in India: pragmatic randomised controlled trial of intramuscular olanzapine versus intramuscular haloperidol plus promethazine BMJ, 2007.PMID 17954514
  7. [7]Isbister GK, Calver LA, Page CB, et al. Randomized controlled trial of intramuscular droperidol versus midazolam for violence and acute behavioral disturbance: the DORM study Ann Emerg Med, 2010.PMID 20868907
  8. [8]Calver L, Page CB, Downes MA, et al. The Safety and Effectiveness of Droperidol for Sedation of Acute Behavioral Disturbance in the Emergency Department Ann Emerg Med, 2015.PMID 25890395
  9. [9]Foo LK, Duffull SB, Calver L, et al. Population pharmacokinetics of intramuscular droperidol in acutely agitated patients Br J Clin Pharmacol, 2016.PMID 27530285
  10. [10]Isbister GK, Calver LA, Downes MA, et al. Ketamine as Rescue Treatment for Difficult-to-Sedate Severe Acute Behavioral Disturbance in the Emergency Department Ann Emerg Med, 2016.PMID 26899459
  11. [11]Ostinelli EG, Brooke-Powney MJ, Li X, et al. Haloperidol for psychosis-induced aggression or agitation (rapid tranquillisation) Cochrane Database Syst Rev, 2017.PMID 28758203
  12. [12]Huf G, Alexander J, Gandhi P, et al. Haloperidol plus promethazine for psychosis-induced aggression Cochrane Database Syst Rev, 2016.PMID 27885664
  13. [13]Anderson EL, Nordstrom K, Wilson MP, et al. American Association for Emergency Psychiatry Task Force on Medical Clearance of Adults Part I: Introduction, Review and Evidence-Based Guidelines West J Emerg Med, 2017.PMID 28210358
  14. [14]Wilson MP, Nordstrom K, Anderson EL, et al. American Association for Emergency Psychiatry Task Force on Medical Clearance of Adult Psychiatric Patients. Part II: Controversies over Medical Assessment, and Consensus Recommendations West J Emerg Med, 2017.PMID 28611885
  15. [15]Spencer BWJ, Gergel T, Hotopf M, et al. Unwell in hospital but not incapable: cross-sectional study on the dissociation of decision-making capacity for treatment and research in in-patients with schizophrenia and related psychoses. Br J Psychiatry, 2018.PMID 29909778
  16. [16]Huf G, Coutinho ES, Adams CE, et al. Physical restraints versus seclusion room for management of people with acute aggression or agitation due to psychotic illness Psychol Med, 2012.PMID 22405443
  17. [17]Knox DK, Holloman GH Jr Use and avoidance of seclusion and restraint: consensus statement of the american association for emergency psychiatry project BETA seclusion and restraint workgroup West J Emerg Med, 2012.PMID 22461919
  18. [18]Stowell KR, Florence P, Harman HJ, et al. Psychiatric evaluation of the agitated patient: consensus statement of the american association for emergency psychiatry project BETA psychiatric evaluation workgroup West J Emerg Med, 2012.PMID 22461916
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