Which antipsychotic lowers suicide risk the most?

• A. Clozapine
• B. Haloperidol
• C. Olanzapine
• D. Quetiapine

Answer: (A)

Clozapine has the strongest and most consistent evidence for lowering suicidality in schizophrenia. In patients with a history or risk of suicide, trials and meta-analyses show that clozapine reduces suicide attempts and completions more than other antipsychotics. A key study comparing clozapine to another atypical in suicidal schizophrenia found fewer suicidally driven events with clozapine, supporting its unique anti-suicidal benefit. The exact mechanism isn’t fully clear, but clozapine’s broad receptor profile and superior efficacy in treatment-resistant cases appear to lessen factors like hopelessness and impulsivity that contribute to suicide risk. Because of a serious risk of agranulocytosis and the need for regular blood monitoring, clozapine is typically reserved for treatment-resistant cases or when suicidality is a major concern, rather than used as a first-line choice for all patients. Other antipsychotics don’t have as strong or consistent evidence for reducing suicide risk, even though they help with psychosis and mood symptoms.