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Updated: Jun 8, 2026

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Published on: July 4, 2013
Flunitrazepam intake in male offenders.
Anna M Dåderman1, Gunnar Edman, Ann Wirsén Meurling
1Department of Clinical Neuroscience, Division of Social and Forensic Psychiatry, Karolinska Institutet, Stockholm, Sweden.
Flunitrazepam (FZ) use is linked to antisocial behavior in male offenders, specifically Facet 4 of the Psychopathy Checklist-Revised (PCL-R). This finding has clinical implications for assessing and treating individuals with substance use disorders and antisocial traits.
Area of Science:
- Forensic Psychiatry
- Psychology
- Pharmacology
Background:
- Flunitrazepam (FZ) abuse is a global issue linked to violence and aggression.
- Benzodiazepines, including FZ, may increase aggression in vulnerable males.
- Chronic high-dose FZ intake elevates aggression in male rats.
Purpose of the Study:
- To investigate the relationship between psychopathy (and its facets) and substance use disorders, focusing on FZ.
- To examine the association between individual Psychopathy Checklist-Revised (PCL-R) items and FZ use.
Main Methods:
- Study included 114 male offenders (aged 14-35) convicted of severe offenses.
- Psychopathy and its four facets (Interpersonal, Affective, Lifestyle, Antisocial) were assessed using the PCL-R.
- Substance use, including FZ, was evaluated in relation to psychopathy scores.
Main Results:
- Substance use, including FZ, was not more prevalent in individuals with high overall psychopathy scores.
- FZ use was significantly more common in offenders scoring high on Facet 4 (Antisocial) of the PCL-R (OR = 4.30).
- Criminal versatility was the only PCL-R item significantly associated with FZ use (OR = 3.7).
Conclusions:
- Flunitrazepam (FZ) intake shows a specific relationship with the Antisocial facet (Facet 4) of psychopathy, not psychopathy per se.
- Antisocial behavior, characterized by poor behavioral control and criminal versatility, is more typical in FZ users.
- Clinicians should consider the heightened risk of FZ use in offenders with high Facet 4 scores for improved assessment and treatment.
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