drostanolone propionate ERGO
100mg/ ml, 10 ml


Drostanolone Propionate or Masteron is primarily designed for the treatment of breast cancer patients by inhibition of estrogen production. Masteron became a favorite steroid among athletes and competitive bodybuilders. It is a very popular anabolic steroid. Masteron is a derivative of dihydrotestosterone or DHT, which resists the conversion to estrogen through aromatization. Also it blocks the conversion through the aromatization of free testosterones to estrogen. This makes Masteron a common part of high anabolic cycle.


When injected Drostanolone Propionate provides a peak release of the base steroid about one day after injection. Drostanolone acts similarly to testosterone, although has proven safer with users as it is not metabolized by aromatase or 5a-reductase into estrogenic compounds such as estradiol, or into DHT. It is more anabolic than androgenic steroid. This also means that it does not cause the heavy water retention normally associated with highly androgenic steroid compounds like the methandrostenolone. Once metabolized, the drug has the effect of increasing nitrogen uptake by muscle, leading to an increase in the rate of protein synthesis. It also has the secondary effects of stimulating the appetite, reducing the amount of fat being deposited in the body, and decreasing the rate of catabolism. Drostanolone Propionate has a half-life of 2-3 days.

Indications and Usage

Males: Drostanolonum is indicated for increasing muscular mass, hardness and strength without water retention and now estrogenic activity, as well as increasing the metabolic rate, which means an increase of the fat burning rate. Famales: Drostanolonum may be used secondarily in postmenopausal women with advancing inoperable breast cancer.


Hypersensitivity to the substance or excipients.
Drostanolone is contradicted in men with the breast carcinomas or with known or suspected prostate carcinomas or liver/renal diseases
Dosage and administration
Drostanolonum propionate is administrated by the intramuscular injection. It must not be given intravenously. Intramuscular injections should be given deep in the gluteal muscle. Males: 200-400 mg per week, given 2-3 times a week. Females: for breast cancer treatment 200-300 mg per week, given 2-3 times a week. For physique or performance enhancing purposes 50-75 mg per week, given 2-3 times a week


Store in a dark, dry place, at the room temperature. Do not refrigerate. Keep away from children.


Drostanolone, through its metabolic effects, stimulates the nervous, mental, and physical activities of a patient. Therefore, it should be used with caution in the presence of cardiovascular and renal diseases, especially in elderly males. Prolonged administration or excessive dosage may cause inhibition of testicular function( oligospermia and/or decrease of ejaculation volume). Women should be observed for signs of virilization. Discontinuation of drug therapy at the mild virilism is necessary to prevent irreversible virilization. Anaphylactic reactions, although rare, may occur, and treatment should be readily available. Hypersensitivity reactions, including rash and dermatitis, have been reported.

Drug interactions

Anabolic steroids may increase sensitivity to oral anticoagulants. Dosage of the anticoagulant may have to be adjusted in order to maintain the prothrombin time at the desired therapeutic level. Patients receiving oral anticoagulant therapy require close monitoring, especially when starting or stopping taking anabolic steroids.

Adverse effects

The side effects include bloating or water retention and gynecomastia. While there is low aromatization with Masteron it still has a significant androgenic side-effects that one should expect when using this steroid. This may include bouts of oily skin, acne, and body/facial hair growth. Anabolic/androgenic steroids may also aggravate male pattern hair loss. Anabolic/androgenic steroids can have deleterious effects on serum cholesterol. This includes a tendency to reduce HDL (good) cholesterol values and increase LDL (bad) cholesterol values, which may shift the HDL to LDL balance in a direction that causes greater risk of arteriosclerosis. It could shut down the production of testosterone, so users should be careful to use it in post cycle therapy because it can interfere with recovery.


There have been no reports of acute overdosing with this substance. Symptomatic treatment should be provided.


1x10ml glass vial