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Suicide and crisis terms

Suicidal ideation

Shariq Refai, MD, MBA, board-certified psychiatrist and the reviewer of this article.

Reviewed by Shariq Refai, MD, MBA·Updated March 15, 2026·About 3 minutes

Canonical definition at Shrinktionary. This entry adds the depression-specific angle.

About this term

Sources

  • CDC. Suicide Data and Statistics. 2023.
  • SAMHSA. Key Substance Use and Mental Health Indicators. 2022.
  • Stanley B, Brown GK. Safety Planning Intervention: A Brief Intervention to Mitigate Suicide Risk. Cognitive and Behavioral Practice. 2012.

Primary source: NIMH: Suicide prevention.

Frequently asked questions

What's suicidal ideation?
Suicidal ideation is thinking about, considering, or planning suicide. Clinicians distinguish passive ideation (a wish to be dead without a plan or intent) from active ideation (intent or a plan). Both deserve clinical attention; active ideation with intent or a plan is an emergency.
When is suicidal ideation an emergency?
Active intent, a plan, access to means, or a recent attempt is a reason to call or text 988, call 911, or go to the nearest emergency department now. If you're with someone in immediate danger, don't leave them alone and reduce access to lethal means.
How common is suicidal ideation?
About 12.3 million U.S. adults reported serious thoughts of suicide in the past year (SAMHSA, 2022). Lifetime prevalence in major depressive disorder is substantially higher. Asking about suicide doesn't plant the idea; research consistently shows that asking is safe and is the first step in a safety plan.
How do clinicians assess suicidal ideation?
A clinical assessment covers the frequency, intensity, and duration of thoughts, presence of intent or a plan, access to means (especially firearms and stockpiled medication), prior attempts, protective factors, and reasons for living. The Columbia Suicide Severity Rating Scale (C-SSRS) is one common tool.
What helps reduce suicidal ideation?
Treating the underlying depression, a written safety plan made with a clinician, means restriction (especially firearms), follow-up contact after an emergency visit, and certain medications including lithium and clozapine in selected patients have evidence. The Stanley-Brown Safety Planning Intervention reduces suicide attempts after a crisis (JAMA Psychiatry, 2018).

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Last reviewed March 15, 2026.

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