Antidepressant medication prevents suicide in depression

Area of Science:

• Psychiatry
• Toxicology
• Epidemiology

Background:

• Ecological studies show decreased suicide rates correlating with increased antidepressant use.
• This study investigates the individual-level hypothesis of antidepressants as a causal factor in suicide reduction.

Purpose of the Study:

• To examine the association between antidepressant detection and suicide risk at an individual level.
• To test the hypothesis that antidepressant medication plays a causal role in preventing suicide.

Main Methods:

• Toxicological data from 18,922 suicides in Sweden (1992-2003) were analyzed.
• Data were linked with psychiatric hospitalization and sociodemographic registers.
• Comparison between suicide cases, non-suicide controls, and psychiatric in-patients was performed.

Main Results:

• Antidepressant detection was lowest in non-suicide controls.
• Detection rates were higher in suicides, particularly those without prior depression-related inpatient care.
• Suicides with a history of inpatient treatment for depression showed no increased antidepressant detection.

Conclusions:

• The lack of increased antidepressant detection in depressed individuals who died by suicide suggests a protective effect.
• Post-discharge antidepressant treatment may have prevented a substantial number of suicides among depressed patients.
• Findings support the role of antidepressant medication in suicide prevention.