Brand

SPECTRUM PHARMA

Package

10 ml (250 mg/ml)

NEBIDO 250 mg is a branded testosterone undecanoate medicine from Bayer. Official product information identifies NEBIDO as a 1000 mg/4 mL solution, equivalent to 250 mg of testosterone undecanoate per mL. Therefore, the “250 mg” designation refers to concentration, while the complete marketed presentation contains 1000 mg in 4 mL. Distinguish the active ingredient concentration from the total amount in the vial or ampoule.

NEBIDO 250 mg Product Details

NEBIDO contains testosterone undecanoate, an ester of testosterone used in testosterone replacement therapy for adult men with confirmed testosterone deficiency. Current product information from Bayer and European medicines references identifies the medicine as a prescription product. Availability, authorization, packaging, and labeling can vary between countries.

The current UK product information lists NEBIDO as 1000 mg/4 mL, with each mL containing 250 mg testosterone undecanoate. The same documentation identifies a clear, colorless to yellowish-brown oily solution and lists benzyl benzoate and refined castor oil among the excipients. Verify the exact packaging for the relevant market.

Product Specifications

• Product name: NEBIDO
• Active ingredient: Testosterone undecanoate
• Concentration: 250 mg/mL
• Total presentation: 1000 mg/4 mL
• Pharmaceutical form: Solution for injection
• Product category: Testosterone/androgen
• Manufacturer: Verify from current packaging
• Regulatory status: Prescription medicine; verify local authorization
• Package presentation: One ampoule or vial, depending on market

Testosterone Undecanoate Information

Testosterone undecanoate differs chemically from testosterone cypionate and testosterone enanthate because each uses a different ester. Therefore, products with different testosterone esters should not be treated as identical formulations simply because they contain testosterone.

Official NEBIDO documentation states that the medicine is intended for testosterone replacement in adult men when testosterone deficiency has been confirmed through appropriate clinical and laboratory assessment. Furthermore, current medicines information identifies NEBIDO as a prescription-only product in several markets. These regulatory classifications apply to the authorized medicine and do not automatically validate unrelated products using similar names.

For product information, customers can review Iron Elite Nutrition alongside official pharmaceutical references. In particular, the current package label should confirm the manufacturer, batch number, expiration date, presentation, and market-specific authorization.

Regulatory Considerations

NEBIDO has documented regulatory authorization in multiple jurisdictions. For example, the UK electronic Medicines Compendium identifies NEBIDO 1000 mg/4 mL as a prescription-only medicine, while Indonesia’s regulatory database lists NEBIDO with testosterone undecanoate at 250 mg/mL. These records demonstrate authorized presentations but do not establish the authenticity of every commercial package.

Regulatory requirements can differ between countries. Consequently, customers should verify local rules concerning prescribing, dispensing, possession, importation, distribution, and sale. This description is intended for product identification and general research. It does not provide dosing schedules, injection instructions, or recommendations for non-prescribed use.

Sports and Anti-Doping Information

Athletes should also review current anti-doping requirements when researching testosterone products. The 2026 World Anti-Doping Agency Prohibited List places anabolic androgenic steroids in category S1, prohibited at all times. WADA also clarified that esters of prohibited steroids are included. Therefore, testosterone undecanoate products can have anti-doping implications for competitive athletes.

Overall, NEBIDO 250 mg is best understood as the 250 mg/mL concentration of an authorized testosterone undecanoate medicine, rather than a separate 250 mg total-dose product. Official documentation distinguishes the concentration from the complete 1000 mg/4 mL presentation. Always compare commercial listings with the current official label.

Before making any product-related decision, review the original packaging, lot information, expiration date, manufacturer details, and applicable local authorization. Likewise, keep the exact product label available when consulting a healthcare professional or checking official regulatory sources. This approach helps you evaluate NEBIDO accurately without assuming that the product name or concentration alone proves authenticity or suitability.