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Medical definition

Masteron (Drostanolon propionate and enantate) is an injectable hormone preparation that is similar in chemical structure to dihydrotestosterone.

Characteristics of the active ingredient

Dostalon (Masteron), which can be purchased from specialised sites, belongs to the anabolic steroid group. The product was originally developed to treat hormone-sensitive breast tumours in women. Its therapeutic effect was achieved by blocking estrogen receptors and preventing their stimulating effect on tumour cells. The androgenic effect of Masteron is lower than that of testosterone propionate. The anabolic effect of Drostanolone propionate is to increase protein formation, strengthen bone tissue and increase muscle mass. In men, it activates libido and improves potency and has a stimulating effect on spermatogenesis.

Use of Drostanol in sports

The drug is hardly ever used directly in oncology because of the frequent symptoms of virilisation during treatment. It is actively used in bodybuilding and sports. Masterone has androgenous and anabolic effects on the male body. The democratic price of Drostanol in the UK allows it to be used by all athletes and bodybuilders who want to improve body quality and results.

The main positive effects of Masteron in sports:

  • helps build and maintain muscle mass;
  • improves the relief of the body and drying results;
  • reduces the percentage of fat deposits by 5-7%;
  • has a mild diuretic effect and removes excess water from the body;
  • improves the efficiency of strength training;
  • increases the endurance of runners and athletes;
  • helps to lose excess weight without catabolic effects and loss of muscle mass.

Another reason to buy Drostanolone in London is that it does not undergo a flavouring reaction in the male body. This means that steroid use does not develop typical side reactions (gynaecomastia, swelling) associated with increased levels of female sex hormones. Masterone has a moderate effect as an aromatase inhibitor, which enhances its positive effect on muscle mass conservation.

Masteron. Contraindications

Masteron is categorically forbidden to be used in sports in women because it causes virilisation: increased body hair growth, coarsening of the voice, and hypertrophy of the external genitalia. In men, the product is not used in such conditions:

  • hypersensitivity to the active substance;
  • pathologies of the liver and kidneys and acute stage;
  • arterial hypertension;
  • severe hypercalcemia.


If used at the same time, Masteron may enter into competitive relationships with other medicinal products. Before you buy Drostanolone, you must remember that it cannot be taken in combination with inducers of microsomal liver enzymes. These include rifampicin, barbiturates, carbamazepine and salicylates. These drugs enhance metabolic transformations and shorten Masteron's activity time in the blood. Drostanolone propionate may be combined with antiestrogens, aroma blockers and gonadotropins. It is not advisable to use the drug together with antacids, anti-secretaries and enterosorbents. They disturb the bioavailability of the androgen and reduce its positive effects on muscle tissue.

Side effects

Feedback shows that Drostanol (Masteron) has almost no unpleasant consequences if the instructions for use are followed. Given that the drug has a low anabolic index, it can provoke androgenic side effects such as androgens:

  • increased aggressiveness and nervousness;
  • acne disease;
  • alopecia;
  • prostate hypertrophy.

With prolonged use of Masteron in large doses, there is a risk of hypercalcemia and hypercalciuria. Liver dysfunction is sometimes observed with the development of parenchymatous hepatitis and jaundice.

Masteron. Admission courses

The scheme of application of Masteron for muscle mass gain is established taking into account its pharmacokinetic properties. The Drostanol, whose course is selected individually for each athlete, is introduced three times a week. This helps maintain a stable propionate concentration during the application. The standard dosage of the active ingredient in sports is 400-500 mg per week. This amount should be strictly observed. It has been determined that exceeding the recommended concentrations does not cause an increased mass gain, but often provokes unwanted reactions.