Some people experience it, some don't.. This could be due to Serotonin level. Serotonin is one of the brain's feel good substances. Increased levels improce your abil8ity to cope with stress while decreased serotonine causes depression and aggression. Northeastern University scientists found that hamsters given high doses of anabolic steroids had lower brain levels of serotonin and became more aggressive normal. Giving the animals Prozac, that increases serotonin, made them less aggressive. This could be a reason why some people experience roid rage and some don't. Some users previous to steroid use may have already low Serotonin levels!!