It should go without saying that Halotestin is an androgen, and a very strong one at that. As a result, the incidences of potential androgenic side effects, especially in those who are sensitive to androgenic side effects, are very high. Those who are sensitive to androgenic side effects (especially the problem of androgen triggered male pattern baldness) should exercise caution and the best possible decision would be to avoid the use of such a strong androgen all together. It is in fact the goal of many bodybuilders and athletes to experience one particular androgenic side effect associated with Halotestin: the increase in competitive drive and aggression. Halotestin in particular is not only a very strong androgen in its own right, but it is also an anabolic steroid that possesses a very high affinity for interaction with the 5-alpha reductase (5AR) enzyme, which is the enzyme responsible for the conversion of androgens into (normally) much stronger androgenic metabolites (for example, the 5AR enzyme is responsible for the conversion of Testosterone into the stronger androgen Dihydrotestosterone).