The antitumor activity of drostanolone appears related to reduction or competitive inhibition of prolactin receptors or estrogen receptors or production.

Drostanolone enanthate 100 USP injection provides drostanolone enanthate, a potent androgenic steroid that has similar characteristics of dihydrotestosterone. Drostanolone is incapable of aromization and therefore it doesn't convert into oestrogen. Both drostanolone' anabolic and androgenic activity is far greater than methyl testosterone. The esterification of the 17-beta-hydroxyl group increases the duration of the action of drostanolone. Drostanolone esters in oil injected intramuscularly are absorbed slowly from the lipid phase, thus Drostanolone enanthate 100E can be administered at intervals of every 1-2 weeks.

Drostanolone Propionate or Masteron is probably one of the most interesting steroids used by athletes. It is primarily for the treatment of breast cancer patients to inhibit estrogen production. Estrogen is the hormone secreted by female that gives them their distinct sexual characteristics. Maseril, the trademark of Drostanolone Propionate when used in breast cancer therapy is combined with SERM (Selective Estrogen Receptor Modulator). There was a drop in estrogen levels among women who had gone through treatment using this hormone. Masteron had become a favorite steroid among athletes and competitive bodybuilders. It is a pretty popular anabolic steroid

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