Suicide risk mitigation

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Last reviewed: 10 Aug 2025
Last updated: 10 Nov 2023

Summary

Definition

History and exam

Key diagnostic factors

  • current suicidal intent
  • access to lethal means
  • risk factors
Full details

Risk factors

  • current suicidal plan
  • self-harm
  • history of mental illness, including substance misuse
  • availability of lethal means
  • history of childhood abuse or neglect
  • family history of death by suicide
  • male sex
  • prison inmate
  • family history of psychiatric illness
  • physical illness
  • marital status (divorced, single, widowed)
  • professions/occupations (unemployed, self-employed, agricultural workers, medical and dental professionals)
  • psychosocial stressors
Full details

Diagnostic investigations

1st investigations to order

  • Clinical diagnosis
Full details

Treatment algorithm

ACUTE

at risk of suicide

Contributors

Expert advisers

Alys Cole-King, MB, BCh, DGM, MSc, FRCPsych

Consultant Liaison Psychiatrist

Liaison Team

Glan Clwyd Hospital

Betsi Cadwaladr Health Board

St Asaph

Wales

UK

Biography

Disclosures

ACK is an employee and director of 4Mental Health and, in this capacity, has received funding for designing and delivering training. ACK is an author of references cited in this topic.

Alice Oates

ST6 General Adult Psychiatry

South London and Maudsley NHS Foundation Trust

London

UK

Disclosures

AO declares that she has no competing interests.

Acknowledgements

BMJ Best Practice would like to gratefully acknowledge the previous expert contributor, whose work has been retained in parts of the content:

Angharad de Cates, BMBCh, BA Hons (Oxon), MSc (Warw), MRCPsych

Wellcome Trust Clinical Doctoral Fellow

Department of Psychiatry

University of Oxford

Warneford Hospital

Honorary Clinical Fellow Oxford Health NHS Foundation Trust

Oxford

UK

Disclosures: AdeC is in receipt of a clinical doctoral training fellowship from the Wellcome Trust (since October 2018) and a travel fellowship from the Royal College of Psychiatrists/Gatsby Foundation. All are external bodies that fund research into and/or release information that includes suicide prevention.

Peer reviewers

Peter Aitken, MB ChB

Director of Research & Development

Devon Partnership NHS Trust

Honorary Associate Professor

University of Exeter Medical School

Exeter

UK

Disclosures

PA is Clinical Lead for the NHS SW Strategic Clinical Network, and Trust Lead for Suicide Prevention, Devon Partnership NHS Trust. He is a also a trustee of the Lions Barber Collective Charity and chair of the Royal National Lifeboat Institution Medical Committee.

Peer reviewer acknowledgements

BMJ Best Practice topics are updated on a rolling basis in line with developments in evidence and guidance. The peer reviewers listed here have reviewed the content at least once during the history of the topic.

Disclosures

Peer reviewer affiliations and disclosures pertain to the time of the review.

References

Our in-house evidence and editorial teams collaborate with international expert contributors and peer reviewers to ensure that we provide access to the most clinically relevant information possible.

Key articles

National Institute for Health and Care Excellence. Self-harm: assessment, management and preventing recurrence. Sept 2022 [internet publication].Full text

Royal College of Emergency Medicine. Mental health in emergency departments: a toolkit for improving care. Apr 2021 [internet publication].Full text

Reference articles

A full list of sources referenced in this topic is available to users with access to all of BMJ Best Practice.
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