Androgenic substance, comprising testosterone esters. It affects the development and function of the external genitalia, prostate, seminal vesicles, and secondary sexual characteristics (voice, hair growth). Participates in the formation of the constitution of the body and sexual behavior, stimulates the libido and potency, stimulates spermatogenesis. Is an antagonist of female sex hormones – estrogen. Has anabolic effect which manifests itself in stimulating protein synthesis, the delay required for the synthesis of protein, potassium, sulfur, phosphorus, strengthen the fixation of calcium in the bones and increase lean body mass. With sufficient protein diet stimulates erythropoietin production.