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Sustanon 250

Sustanon is a trade name owned by Organon Pharmaceuticals for oil-based injectable blends of esterified testosterone compounds.

Sustanon 250 is a blend of four esterified testosterone compounds:

Sustanon 100 was similar, though with three esters. This smaller dose was usually for pediatric use.

  • 20 mg testosterone propionate
  • 40 mg testosterone phenylpropionate
  • 40 mg testosterone isocaproate

Sustanon 100 has not been produced since 2009.[1]

The numbers in the names refer to the fact that the content of testosterone compounds in each blend are 250 and 100 mg/ml, respectively.

The different testosterone esters provide for different half-lives. Esterization of the testosterone molecules provides for a sustained (but non-linear) release of testosterone hormone from the injection depot into the blood plasma.

While the intention of the mixed testosterone esters in Sustanon is to provide more stable serum testosterone levels[2], a single long-ester testosterone, such as testosterone cypionate or testosterone enanthate, may actually provide more stable serum testosterone levels.[medical citation needed]

Sustanon is the preferred method of testosterone replacement in the UK as detailed in the British National Formulary.[citation needed] There was a brief shortage of Sustanon 250 during late 2011, due to licensing problems[3] and a further shortage in mid-2012 due to manufacturing problems.[medical citation needed]

This form of testosterone is a popular choice of anabolic steroid among bodybuilders and athletes.[medical citation needed]

See also[edit]


  1. ^ "Discontinuation of Sustanon 100 (testosterone replacement therapy)". NeLM. Archived from the original on 29 September 2009. Retrieved 9 August 2016.
  2. ^ "Pharmacological information. Sust 250 concept". 2018-06-19. Retrieved 2018-07-10.
  3. ^[dead link]