Package: 1 vial (250mg/ml 10ml)

Active Substance: Testosterone Undecanoate

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Undecadrol, also known by its generic name Testosterone Undecanoate, is an injectable medication produced by Balkan Pharmaceuticals. It is primarily used to treat men with low testosterone levels, a condition known as hypogonadism. Testosterone Undecanoate is a long-acting form of testosterone that helps restore normal levels of this vital hormone in the body, supporting various physiological functions such as muscle growth, fat distribution, bone density, and sexual function. This comprehensive guide will explore Undecadrol’s indications, administration, medical action, precautions, side effects, overdosage, and conclusion.


Undecadrol is primarily indicated for the treatment of male hypogonadism, a condition where the body does not produce enough testosterone. This can result in symptoms such as fatigue, depression, reduced muscle mass, decreased libido, and erectile dysfunction. By supplementing testosterone levels, Undecadrol helps alleviate these symptoms and improves overall quality of life. It is also used off-label by athletes and bodybuilders to enhance muscle mass, strength, and performance, although this use is not approved by medical authorities and carries potential risks.


While Undecadrol is effective for many, it is not suitable for everyone. It is contraindicated in men with breast cancer, known or suspected prostate cancer, or any allergy to testosterone or any of its components. Individuals with severe heart, liver, or kidney disease should avoid this medication, as testosterone can exacerbate these conditions. It is also contraindicated for women, especially those who are pregnant or breastfeeding, due to the risk of masculinization and other adverse effects. Consulting a healthcare professional before starting Undecadrol is essential to ensure it is safe based on your health history and current condition.


Undecadrol is administered via intramuscular injection, typically into the gluteal muscle. The standard dosage for treating hypogonadism is 1000 mg, administered once every 10 to 14 weeks. This dosing schedule helps maintain stable testosterone levels in the body, avoiding the peaks and troughs associated with shorter-acting forms of testosterone. It is crucial to follow the prescribed dosage and administration schedule closely. For athletes and bodybuilders using Undecadrol off-label, the dosage and frequency can vary widely, but it is important to adhere to medical guidelines to minimize the risk of side effects and complications.

Medical Action

Testosterone Undecanoate, the active ingredient in Undecadrol, is an esterified form of testosterone. Once injected, it is gradually released into the bloodstream, providing a steady supply of testosterone over an extended period. Testosterone binds to androgen receptors in various tissues, exerting its effects on muscle growth, bone density, red blood cell production, and sexual function. It also influences mood, energy levels, and overall well-being. By restoring normal testosterone levels, Undecadrol helps reverse the symptoms of hypogonadism and supports overall male health.


Before starting Undecadrol, a thorough medical evaluation is necessary. Regular monitoring of testosterone levels, blood pressure, and prostate-specific antigen (PSA) levels is recommended to detect any adverse effects early. Individuals should inform their healthcare provider about any other medications they are taking, as testosterone can interact with certain drugs, such as anticoagulants and insulin. It is also important to monitor for signs of polycythemia (increased red blood cell count), which can occur with testosterone therapy and increase the risk of blood clots. Adopting a healthy lifestyle, including a balanced diet and regular exercise, can help mitigate some of the risks associated with Undecadrol.

Side Effects

Like any medication, Undecadrol can cause side effects. Common side effects include injection site reactions such as pain, swelling, or redness, as well as acne, hair loss, and increased body hair. More serious side effects may include mood swings, aggression, liver dysfunction, and cardiovascular issues such as high blood pressure and heart disease. Long-term use can also lead to polycythemia, prostate enlargement, and an increased risk of prostate cancer. If any severe or persistent side effects occur, it is important to seek medical attention immediately. Regular follow-ups with a healthcare provider are crucial to monitor for any adverse effects and to adjust the treatment plan as needed.


An overdose of Undecadrol can lead to serious health complications. Symptoms of overdose may include severe headache, dizziness, nausea, vomiting, and prolonged or painful erections. In extreme cases, an overdose can cause significant hormonal imbalances and increase the risk of cardiovascular events. If an overdose is suspected, it is crucial to seek emergency medical help immediately. Treatment typically involves supportive care, including monitoring of vital signs and administration of medications to counteract the effects of the overdose. Adhering strictly to the prescribed dosage and administration guidelines can prevent the risk of overdose and associated health risks.


Undecadrol (Testosterone Undecanoate) from Balkan Pharmaceuticals is a potent injectable medication that plays a significant role in treating male hypogonadism. Its ability to restore normal testosterone levels and support various physiological functions makes it an invaluable tool for achieving therapeutic and performance goals. However, it is essential to use Undecadrol responsibly and under the supervision of a healthcare professional. Understanding the indications, contraindications, proper administration, and potential side effects can help users maximize the benefits while minimizing risks. Always consult with a healthcare provider before starting any new medication to ensure it is appropriate for your individual health needs.


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