Background and Objectives
Anabolic‐androgenic steroid (AAS) use has become a major worldwide substance use disorder, affecting tens of millions of individuals. Importantly, it is now increasingly recognized that some individuals develop uncharacteristically violent or criminal behaviors when using AAS. We sought to summarize available information on this topic.
Methods
We reviewed the published literature on AAS‐induced behavioral effects and augmented this information with extensive observations from our clinical and forensic experience.
Results
It is now generally accepted that some AAS users develop uncharacteristically violent or criminal behaviors while taking these drugs. Although these behaviors may partially reflect premorbid psychopathology, sociocultural factors, or expectational effects, accumulating evidence suggests that they are also attributable to biological effects of AAS themselves. The mechanism of these effects remains speculative, but preliminary data suggest a possible role for brain regions involved in emotional reactivity, such as the amygdala and regions involved in cognitive control, including the frontal cortex. For unknown reasons, these effects appear idiosyncratic; most AAS users display few behavioral effects, but a minority develops severe effects.
Conclusion and Scientific Significance
Professionals encountering AAS users in clinical or forensic settings should be alert to the possibility of AAS‐induced violence or criminality and should employ strategies to assess whether AAS is indeed a contributory factor in a given case. Further research is needed to elucidate the mechanism of AAS‐induced violence and to explain why only a subset of AAS users appears vulnerable to these effects. (Am J Addict 2021;00:00–00)