Does tren make you angry?

Scientists have tried to test the association between anabolic steroids and aggression by administering high doses of steroids or placebos for days or weeks to human volunteers and asking them to report their behavioral symptoms.

To date, four such studies have been conducted. In three of them, high-dose steroids produced more feelings of irritability and aggression than placebo, although the effects appeared to be highly variable in different volunteers. In one study, the drugs had no such effect. One possible explanation, according to the researchers, is that not all anabolic steroids increase irritability and aggression. Recent animal studies show an increase in aggression after steroids are administered.
In a few controlled studies, a minority of volunteers reported aggression or obvious adverse behaviors as a result of anabolic steroid administration.

In summary, the extent to which steroid abuse contributes to violence and behavioral disorders is not known. As with health complications resulting from steroid use, the prevalence of extreme cases of violence and behavioral disorders appears to be low, but may be underreported or underrecognized.