Europe — EMA
Nebido (Testosterone Undecanoate)
GNH USA supplies Nebido (Testosterone Undecanoate), a hormone replacement therapy for male hypogonadism. Request a quote for global supply for your needs.
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What is Testosterone Undecanoate?
Testosterone undecanoate, the active ingredient in Nebido, is an androgen presented as an injectable suspension for intramuscular use. It is used for testosterone replacement therapy in males with hypogonadism. GNH USA supplies Nebido as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.
What is Testosterone Undecanoate used for?
Nebido provides long‑acting testosterone replacement for disorders of the male endocrine system.
Primary hypogonadism: restores physiological testosterone levels and alleviates related symptoms. Secondary hypogonadism: supports androgen deficiency caused by pituitary or hypothalamic dysfunction. Testosterone replacement therapy: improves low libido, fatigue, loss of muscle mass and mood disturbances in affected men.
What are the side effects of Testosterone Undecanoate?
Nebido may cause a range of adverse reactions, from mild to severe.
Common Side Effects: - Injection site pain or erythema - Headache - Acne or oily skin - Increased red blood cell count - Fluid retention or mild edema - Mood changes or irritability
Serious or Rare Side Effects: - Polycythemia leading to thrombosis - Cardiovascular events such as myocardial infarction - Liver enzyme elevations - Prostate enlargement or cancer progression - Severe allergic reactions (anaphylaxis) - Significant hypertension or cardiovascular instability
What precautions apply to Testosterone Undecanoate?
Before initiating Nebido therapy, several safety considerations are recommended.
Monitor hematocrit: check regularly to detect polycythemia. Assess prostate health: perform PSA testing and digital exam. Screen cardiovascular risk: evaluate history of heart disease before treatment. Avoid use in known hypersensitivity: discontinue if allergic reaction occurs. Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.
What does Testosterone Undecanoate interact with?
Nebido can interact with other medicines, requiring careful management.
Major Interactions (Avoid): - Anticoagulants: may increase bleeding risk. - Insulin or oral hypoglycemics: can affect glucose control. - Strong CYP3A4 inhibitors: may raise testosterone levels.
Moderate Interactions (Monitor Closely): - Glucocorticoids: may exacerbate fluid retention. - Thyroid hormones: may alter metabolic response. - Other anabolic steroids: additive androgenic effects may increase adverse risk.



