Like other AAS, drostanolone is an agonist of the androgen receptor (AR).  It is not a substrate for 5α-reductase and is a poor substrate for 3α-hydroxysteroid dehydrogenase (3α-HSD), and therefore shows a high ratio of anabolic to androgenic activity.  As a DHT derivative, drostanolone is not a substrate for aromatase and hence cannot be aromatized into estrogenic metabolites .  While no data are available on the progestogenic activity of drostanolone, it is thought to have low or no such activity similarly to other DHT derivatives.  Since the drug is not 17α-alkylated , it is not known to cause hepatotoxicity . 
Despite all positive effects of doping on the body they could be dangerous. Possible side effects of anabolic steroids can be avoided by choosing the right form (oral or injectable) and combination as well as by taking reasonable androgenic dosages. It has to be mentioned, that the most side effects of drugs disappear after the cycle is completed. Moreover, many of them can be blocked during the cycle by using respective supplements. Therefore, in order to avoid possible negative consequences one shall pay attention to studying information about the drugs prior to use them.
The active compound in Superdrol is methasterone (systematic IUPAC name: 17β-Hydroxy-2α,17α-dimethyl-5α-androstane-3-one) – also known as methyldrostanolone and methasteron – which rose to superstar status during its run for the speedy results it can deliver when cycled, especially in terms of very hard and dry gains just after a couple of weeks of usage. Reports of achieving upwards of 20 to 30 pounds of muscle mass were not uncommon from users after cycling with Superdrol in the span of 4 weeks. Its half-life is timed at 6 to 8 hours.