Decrease in suicide among the individuals treated with antidepressants: a controlled study of antidepressants in...

Area of Science:

• Psychiatry
• Epidemiology
• Pharmacology

Background:

• Ecological studies show a decrease in suicide rates coinciding with increased antidepressant use.
• Causality between antidepressant use and suicide reduction has not been established at the individual level.

Purpose of the Study:

• To investigate the individual-level hypothesis that antidepressant medication use contributes to the observed decrease in suicide rates.
• To analyze time trends in antidepressant detection among suicide cases and controls.

Main Methods:

• Forensic toxicological screening data from Sweden (1995-2005) were analyzed.
• The study included 16,937 suicide cases and 33,426 control cases.
• Detection rates of antidepressants and five control medications were compared over time.

Main Results:

• The observed number of suicides with detected antidepressants in 2005 (420) closely matched the number predicted by the hypothesis (409).
• Control medications showed expected detection rates, suggesting they did not influence suicide prevention.
• The trend supported the hypothesis that increased antidepressant use is linked to reduced suicides.

Conclusions:

• The findings support the hypothesis that increased antidepressant prescription has significantly contributed to the decline in suicide rates.
• Individual-level analysis provides stronger evidence for the link between antidepressant use and suicide reduction than ecological studies alone.