Haloxyl with its active substance Fluoxymesterone is an oral anabolic steroid with strong androgenic properties. It is considered to be in the top of aggression producing AAS.
It is well known for its ability to increase aggression, thus it is more used by fighters or weightlifters. Some bodybuilders use it before contest while they are on low carb diet and need something to stimulate them to train harder the last weeks. But even in such cases, Haloxyl usage is usually limited to few weeks rather than cycled like real steroids for months.
Haloxyl is very toxic on liver so it is strongly recommended to limit its usage in dosage and length. When using haloxyl it should be expected worsening of male pattern baldness, acne, and prostate hypertrophy, also elevation of blood pressure, water retention, and increased aggression.