BMJ 1994;308:506-509 (19 February)

Papers

Use of antidepressants among people committing suicide in Sweden

G Isaccsson, P Holmgren, D Wasserman, U Bergman 

Department of Clinical Neuroscience and Family Medicine, Section of Psychiatry, Karolinska Institute, Huddinge University Hospital, S-14186 Huddinge, Sweden Department of Toxicology, National Laboratory of Forensic Chemistry, Linkoping, Sweden Centre for Suicide Research and Prevention, Karolinska Hospital, Stockholm, Sweden Danuta Wasserman, head Department of Medical Laboratory Sciences and Technology, Division of Clinical Pharmacology, Karolinska Institute, Huddinge University Hospital, Huddinge, Sweden. Correspondence and reprint requests to: Dr Isacsson.

Abstract

Objective : To analyse the outcome of depression in the Swedish population as reflected by the detection of antidepressants in a national forensic toxicological screening programme of unnatural deaths.
Design : Antidepressants detected by the National Laboratory of Forensic Chemistry were related to data on use expressed in person years of exposure.
Subjects : All 7000 cases of unnatural death with results from forensic toxicological screening in 1990-1; this included 3400 (85%) of the 4000 cases of suicide in Sweden.
Main outcome measures : Number of findings of antidepressants in the screening programme and number of findings of different antidepressants in relation to their use.
Results : Antidepressants were found in 585 screening tests, corresponding to 542 subjects or less than 16% of the 3400 cases of suicide. Newer,less toxic antidepressants were found more often than the older compounds. Toxic concentrations of antidepressants were found in only 190 cases (5.6%).
Conclusion : A consistent finding in surveys of suicide is that about half of the patients who commit suicide are depressed. The current data suggest that most depressed patients who commit suicide are not taking antidepressants immediately before death.Therapeutic failure may be a greater problem with antidepressants than toxicity as the results did not indicate any advantage of the newer, less toxic antidepressants. All causes of death should be included in risk analyses, thereby providing an estimate of effectiveness as well as toxicity of antidepressants.

Clinical implications

  • Clinical implications

  • In surveys of suicide about half the patients who commit suicide are depressed

  • The availability of effective antidepressants has not substantially lowered the incidence of suicide

  • In forensic toxicological screenings of 3400 (85%) of all 4000 suicides in Sweden in 1990-1 antidepressants were found in less than 16%

  • In relation to their use compounds of lower toxicity were found more often than the more toxic tricyclic antidepressants

  • Therapeutic failure may be a greater problem with antidepressants than toxicity, and all causes of death should be included in risk analyses of these drugs


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