Sustanon is a prescription-only injectable testosterone preparation containing a blend of four testosterone esters in a single oily solution. Each millilitre provides testosterone propionate 30mg, testosterone phenylpropionate 60mg, testosterone isocaproate 60mg, and testosterone decanoate 100mg, giving a combined testosterone content of 250mg per ml. The multi-ester formulation is designed to deliver both a rapid initial rise in testosterone levels and sustained release over a period of weeks, offering a more stable pharmacokinetic profile compared to single-ester preparations. Sustanon is used for testosterone replacement therapy (TRT) in adult males with confirmed hypogonadism and is a prescription-only medicine prescribed under specialist supervision at PrimeLife.
How It Works
The four testosterone esters in Sustanon have differing rates of release from the injection site depot following intramuscular administration. Testosterone propionate is the shortest-acting ester and provides a rapid initial rise in serum testosterone. Testosterone phenylpropionate and isocaproate provide intermediate sustained release, while testosterone decanoate maintains testosterone levels over a more extended period. This combination produces sustained testosterone exposure between doses, though the pharmacokinetic profile may vary between individuals. Sustanon is typically administered every three to four weeks, though dosing intervals may be adjusted by the prescribing clinician based on blood monitoring results and patient response.
Why Choose Sustanon for TRT
Sustanon has been one of the most established and widely prescribed TRT formulations for decades, with a well-documented clinical history and safety profile. The multi-ester composition provides a broader pharmacokinetic window than single-ester formulations, which may reduce the hormonal peaks and troughs that some patients experience between injections with shorter-acting preparations. For patients who prefer an injection-based TRT approach, Sustanon is a proven and effective option with a predictable clinical response when dose and dosing interval are properly optimised through regular monitoring.
As with all TRT at PrimeLife, Sustanon is prescribed only following a full clinical assessment and confirmed hypogonadism diagnosis. Dose and interval are individualised based on regular serum testosterone monitoring to ensure levels remain within the physiological target range throughout treatment.
Important Note
Sustanon is a prescription-only medicine for adult males only. It must not be used in women or children. Sustanon contains arachis (peanut) oil and must not be used in patients with peanut or soya allergy. Regular blood monitoring including testosterone levels, haematocrit, and PSA is required. Common side effects include injection site reactions, acne, mood changes, and elevated haematocrit. Polycythaemia is a recognised long-term risk requiring monitoring. This medication is contraindicated in patients with known or suspected prostate or breast cancer and must only be used as directed by a qualified prescriber at PrimeLife.
