Since estrogen is not an issue, side effects are generally mild with this steroid. As discussed earlier, gynecomastia, water retention, and high blood pressure are mitigated. In addition, Masteron is not liver toxic, even during longer cycles. The only side effects of concern are the basic androgenic properties of dihydrotestosterone. These include oily skin, acne, body/facial hair growth, aggression and accelerated hair loss. Since this compound is already a synthetic DHT, Proscar would have no impact on the level of androgenic effects. Men with a receding hairline or those with a predisposition for male pattern baldness may wish to stay away from Masteron completely, as the potent androgenic effect of this steroid can easily accelerate this condition.