In February 2009, Sports Illustrated reported that Alex Rodriguez tested positive for two AAS, testosterone and metenolone enanthate, while playing for the Texas Rangers in 2003. He claims to have purchased them over the counter, in the Dominican Republic . However, " boli ," as he referred to it, is an illegal substance in the Dominican Republic.   In an interview with ESPN two days after the SI revelations, Rodriguez admitted to using banned substances from 2001 to 2003, citing "an enormous amount of pressure to perform," but said he had not since then used banned performance-enhancing substances.   He said he did not know the name(s) of the particular substance(s) he was using, and would not specify whether he took them in injectable form. 
The side effects of Masteron Enanthate can and primarily surround those of an androgenic nature. The androgenic side effects of Masteron Enanthate may include acne, hair loss in men predisposed to male pattern baldness and body hair growth. Despite a potent binding relationship to the androgen receptor the total androgenic activity should not be extreme and such side effects should not be extreme. If you are predisposed to male pattern baldness this steroid is well known for speeding up hair loss and should be avoided if that is a concern. If you are not predisposed hair loss is impossible.
Important Note: the 5-alpha reductase enzyme, the enzyme that reduces testosterone to DHT, does not metabolize Drostanolone. There is no reduction; it’s already DHT. Because no reduction exists there is nothing to inhibit or block and this means 5-alpha reductase inhibitors like Finasteride will do nothing to combat androgenic effects.
Masteron Enanthate can also promote virilization symptoms in women. Virilization refers to the promotion of male characteristics in women, specifically body hair growth, a deepening of the vocal chords and clitoral enlargement. It is very possible to use this steroid without these issues, although genetic sensitivity will play a role. If symptoms begin to show simply discontinue use and they will rapidly go away. It is when virilization symptoms are allowed to set in that they become a problem and in some cases irreversible.
Important note: Female users of Drostanolone will be best served by choosing Drostanolone Propionate as it will clear the body faster should issues arise.