Suicidal Ideation

The short version

●Suicidal ideation ranges from passive thoughts that life isn't worth living to active planning; it is a symptom — most often of depression — not a diagnosis on its own.
●It is a medical urgency. If you are in danger right now, call or text 988 (the Suicide & Crisis Lifeline) or go to an emergency room.
●Standard antidepressants can take weeks to work, which is the gap that makes rapid-acting options important.
●A single dose of intravenous ketamine reduces suicidal ideation within hours to a day in pooled patient-level analyses.¹ ²
●Ketamine is not a substitute for safety planning, crisis care, or ongoing treatment — it is one rapid-acting tool within a full plan.³
●At-home ketamine is appropriate only for stable patients without acute, active suicidality; active suicidal crisis needs a higher level of care than a home program can provide.

Clinical definition

Suicidal ideation refers to thoughts about, considering, or planning suicide. It is conventionally divided into passive ideation (wishing to be dead, that one would not wake up) and active ideation (thoughts of killing oneself, with or without a plan, intent, or means). It is a transdiagnostic symptom — most commonly part of major depressive disorder, but also seen in bipolar depression, PTSD, borderline personality disorder, and substance use disorders — and its presence raises the urgency and intensity of treatment regardless of the underlying diagnosis. Assessment focuses on intent, plan, access to means, protective factors, and recent losses or stressors. Acute, active suicidal ideation with intent is a psychiatric emergency.

How it differs from related conditions

vs. Major depressive disorder

Depression is the underlying illness; suicidal ideation is one of its possible symptoms. Treating the depression treats the ideation, but acute ideation can need faster, separate intervention.

vs. Treatment-resistant depression

Persistent suicidal thoughts despite adequate antidepressant trials are part of what defines a treatment-resistant picture — and where rapid-acting options like ketamine are considered.

vs. Borderline personality disorder

Chronic suicidality in BPD is driven by emotion dysregulation and is treated primarily with DBT, not by targeting a mood episode.

First-line treatments

Safety planning + means restriction

A collaborative safety plan and reducing access to lethal means are foundational and evidence-based for reducing suicide risk.

Crisis services (988, emergency care)

For active ideation with intent or plan, immediate crisis evaluation is first — call or text 988, or go to an ER.

Treating the underlying disorder

Antidepressants, psychotherapy (especially CBT and DBT), and addressing substance use treat the condition driving the thoughts.

Rapid-acting options when speed matters

Where ideation is severe and antidepressant onset is too slow, ketamine/esketamine and, in emergencies, ECT can reduce ideation quickly.

When standard treatments fail

When suicidal ideation persists despite treatment of the underlying disorder, escalation includes intensive outpatient or inpatient care, ECT (which works rapidly for severe, high-risk depression), and rapid-acting glutamatergic treatment such as ketamine or esketamine. The choice depends on acuity: an active crisis needs the highest level of care available, not a home-based program.

Where ketamine fits

Reducing suicidal ideation is one of ketamine's best-documented rapid effects: pooled patient-level analyses show a single dose lowers suicidal thoughts within hours to a day, separate from and faster than its general antidepressant effect.¹ ² This makes it valuable as part of a plan for a stable patient whose depression carries persistent suicidal thoughts. But it is an adjunct, not a rescue for an acute crisis — the effect can be transient, and ketamine does not replace safety planning, crisis services, or ongoing care.³ For at-home treatment specifically, active or acute suicidality is screened out, because a home setting cannot provide the monitoring an acute crisis requires.

Where this fits with Tovani

Tovani treats depression that may include passive or background suicidal thoughts in stable patients — but active, acute suicidality with intent or plan is screened out at eligibility and directed to crisis care, because at-home treatment is not the right level of care for an emergency. If you are in immediate danger, call or text 988 or go to an emergency room now. For ongoing depression with suicidal thoughts that are not an acute emergency, ketamine may be one rapid-acting part of a fuller treatment plan.

Check eligibility Find treatment options The science behind ketamine

Frequently asked

I'm having suicidal thoughts right now — what should I do?

If you are in danger or thinking about acting, call or text 988 (the Suicide & Crisis Lifeline) or go to the nearest emergency room. That is the right step right now — not an at-home program. You deserve immediate, in-person support.

Does ketamine really reduce suicidal thoughts?

Yes — this is one of its best-documented rapid effects. Pooled patient-level analyses show a single dose lowers suicidal ideation within hours to a day, faster than standard antidepressants. But the effect can be temporary, so it's used as part of a full plan, not as a standalone rescue in a crisis.

Can I get at-home ketamine for suicidal thoughts?

Only if the thoughts are not an acute crisis and you're otherwise stable. Active suicidality with intent or a plan needs a higher level of care than home treatment can safely provide, so it's screened out at eligibility and directed to crisis services.

What's the difference between passive and active suicidal ideation?

Passive ideation is wishing you were dead or wouldn't wake up, without a plan to act. Active ideation involves thoughts of killing yourself, sometimes with a plan, intent, or means. Active ideation with intent is an emergency.

References

Wilkinson ST et al. 2018, American Journal of Psychiatry — Individual participant-data meta-analysis: a single dose of IV ketamine rapidly reduces suicidal ideation. (PMID 28969441)
Price RB et al. 2022, Molecular Psychiatry — International pooled patient-level meta-analysis confirming ketamine's rapid effect on suicidal ideation. (PMID 36071111)
Witt K et al. 2020, Australian & New Zealand Journal of Psychiatry — Systematic review and meta-analysis of ketamine for suicidal ideation across psychiatric disorders. (PMID 31729893)

Last reviewed by Dr. Ben Soffer, DO on June 2, 2026. This page is educational and not a substitute for clinical evaluation. A physician determines whether ketamine therapy is appropriate for your specific situation.