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Trademarks Masteron, Drolban, Metormon, Permastril, etc. – an anabolic steroid that is available in the form of propionate and enanthate esters. Masteron has a high androgenic activity and a moderate anabolic effect. Masteron does not aromatize in the body (that is, it does not turn into estrogen), on the contrary, it is an aromatase inhibitor. Drostanolone is similar in biological action to dihydrotestosterone, as it is a derivative of this hormone. In medicine, Masteron is used as a treatment for breast cancer in women, but due to the high likelihood of virilization, it is currently practically not used.