PHARMATEST U 250 (Testosterone Undecanoate)
PHARMATEST U 250 contains Testosterone Undecanoate (TU), a very long-acting testosterone ester with an estimated half-life of approximately 20–30 days. Due to its extended duration of action, TU is commonly used in hormone replacement therapy (HRT), where injection frequency can often be reduced to once every 2–3 months under medical supervision.
In performance settings, Testosterone Undecanoate is sometimes incorporated into extended cycles because of its slow and steady release profile. Its prolonged activity allows for less frequent injections—typically every 2–6 weeks—while maintaining more stable hormone levels over time. A single 1000 mg administration can sustain physiologically normal testosterone levels for up to three months. Higher dosing protocols are sometimes discussed in non-medical contexts, though these require careful consideration due to potential risks.
Compared to other long esters such as Testosterone Cypionate, Testosterone Undecanoate releases even more gradually, making it one of the slowest-acting injectable testosterone formulations available.
Product Specifications – PHARMATEST U 250
Product Name: PHARMATEST U 250
Active Ingredient: Testosterone Undecanoate
Strength: 250 mg per ml
Form: Injectable solution
Administration: Intramuscular injection
Ester Type: Undecanoate (very long-acting)
Half-Life: Approximately 20–30 days
Release Profile: Slow and sustained
Category: Long-ester testosterone
Primary Use: Hormone replacement therapy (HRT) and extended-cycle protocols





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