Halotestex (fluoxymesterone) is an oral derivative of the male hormone testosterone. Unlike testosterone, halotestex does not convert to estrogen.

Therefore, estrogen-related side effects such as fat deposition, water retention, and gynecomastia do not occur. Furthermore, Halotestex has powerful androgenic properties.  Side effects include aggression, oily skin, and virilization.

Additionally, Halotestex has a release time of between 8-12 hours. Average dosages are 10mg-40mg per day.