Package: 1 vial (100mg/ml 10ml)

Active Substance: Drostanolone Propionate

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Mastabol 100, also known as Drostanolone Propionate, is an injectable anabolic steroid that has gained popularity among bodybuilders and athletes for its ability to enhance muscle definition and hardness. It is a derivative of dihydrotestosterone (DHT), making it a potent androgenic compound with moderate anabolic properties.


Mastabol 100 is primarily indicated for the treatment of breast cancer in postmenopausal women. It is often used as part of a comprehensive treatment plan to help manage and control the spread of estrogen-sensitive breast tumors. Additionally, Mastabol 100 may be prescribed to individuals suffering from muscle-wasting conditions, where it can help preserve lean muscle mass.


While Mastabol 100 can be beneficial for certain medical conditions, there are several contra-indications that should be considered before use:

  1. Pregnancy: Mastabol 100 should not be used during pregnancy due to potential harm to the fetus.
  2. Breastfeeding: It is not recommended to use Mastabol 100 while breastfeeding, as it may pass into breast milk and harm the nursing infant.
  3. Prostate Cancer: Individuals with prostate cancer or a history of prostate issues should avoid Mastabol 100, as it can exacerbate these conditions.
  4. Liver Disease: Mastabol 100 can be hepatotoxic, so individuals with liver disease or impaired liver function should use it with caution.
  5. Hypersensitivity: Individuals who are hypersensitive to Drostanolone Propionate or any of the ingredients in Mastabol 100 should not use this medication.


Mastabol 100 is typically administered via intramuscular injection. The dosage and frequency of administration depend on the individual’s medical condition, age, and response to treatment. It is important to follow the prescribed dosage and administration schedule to achieve the best results and minimize the risk of side effects.

Medical Action

Mastabol 100 exerts its effects by binding to androgen receptors in the body. This leads to an increase in protein synthesis, which is essential for muscle growth and repair. Additionally, Mastabol 100 can enhance nitrogen retention in the muscles, leading to improved muscle mass and strength. Its androgenic properties also contribute to the development of secondary sexual characteristics, such as increased facial and body hair growth.


Before using Mastabol 100, it is important to take certain precautions to ensure safe and effective treatment:

  1. Regular Monitoring: Regular monitoring of liver function, lipid levels, and prostate-specific antigen (PSA) levels is recommended to detect any potential complications early.
  2. Liver Support: To minimize the risk of liver toxicity, it is advisable to use liver support supplements and avoid alcohol consumption while using Mastabol 100.
  3. Cardiovascular Health: Mastabol 100 can negatively affect cholesterol levels, so it is important to maintain a healthy diet and exercise regimen to support cardiovascular health.
  4. Prostate Health: Regular prostate exams are recommended, especially for older individuals, to monitor for any potential prostate-related issues.
  5. Women and Children: Mastabol 100 is not recommended for use in women and children due to its potential to cause virilization in women and disrupt normal growth and development in children.

Side Effects

While Mastabol 100 can be effective for certain medical conditions, it can also cause a range of side effects, including:

  1. Androgenic Side Effects: These may include acne, oily skin, and increased facial and body hair growth.
  2. Cardiovascular Effects: Mastabol 100 can negatively affect cholesterol levels, increasing the risk of cardiovascular disease.
  3. Liver Toxicity: Prolonged use of Mastabol 100 can lead to liver damage, so regular liver function tests are recommended.
  4. Hormonal Changes: Mastabol 100 can suppress natural testosterone production, leading to hormonal imbalances and potential infertility.
  5. Psychological Effects: Some users may experience mood swings, aggression, or irritability while using Mastabol 100.


In case of an overdose, immediate medical attention is required. Symptoms of Mastabol 100 overdose may include:

  1. Severe Acne: Excessive androgen levels can lead to severe acne breakouts.
  2. Hypertension: High blood pressure can occur, potentially leading to cardiovascular complications.
  3. Liver Damage: Overdose can exacerbate liver toxicity, leading to serious liver conditions.
  4. Virilization in Women: Overdose can cause irreversible virilization in women, including deepening of the voice, clitoral enlargement, and male pattern baldness.

Treatment for Mastabol 100 overdose is supportive and symptomatic, focusing on stabilizing the patient and addressing specific symptoms. There is no specific antidote for Mastabol 100 overdose.


Mastabol 100 from British Dragon Pharmaceuticals is a powerful anabolic steroid with both androgenic and anabolic properties. While it can be effective for certain medical conditions, its use should be approached with caution due to the potential for side effects and complications. By following the prescribed dosage and administration guidelines, as well as taking necessary precautions, individuals can safely use Mastabol 100 to achieve their treatment goals. However, it is important to consult with a healthcare professional before starting any new medication to ensure it is safe and appropriate for your specific needs


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