Testosterone propionate/testosterone phenylpropionate/testosterone isocaproate/testosterone decanoate

Testosterone propionate/testosterone phenylpropionate/testosterone isocaproate/testosterone decanoate (TP/TPP/TiC/TD), also known as a Sustanon 250 (Organon), is an injectable combination medication of four testosterone esters, all of which are androgens/anabolic steroids.

Pharmacology
The four testosterone esters are as follows;

Cumulatively, a 1 ml of the oil solution contains exactly 250 mg of above mentioned testosterone esters. This particular numerical value is clearly depicted in the name of the product, Sustanon 250.
 * 30 mg testosterone propionate
 * 60 mg testosterone phenylpropionate
 * 60 mg testosterone isocaproate
 * 100 mg testosterone decanoate

They are provided as an oil solution and are administered by intramuscular injection. The different testosterone esters provide for different elimination half-lives in the body. Esterification of testosterone provides for a sustained but non-linear release of testosterone hormone from the injection depot into the circulation. Sustanon 100 is administered once every 2 weeks and Sustanon 250 is administered once every 3 to 4 weeks.

Sustanon is the preferred method of testosterone replacement in the United Kingdom as detailed in the British National Formulary. There was a brief shortage of Sustanon 250 during late 2011, due to shifting of manufacturing site, and a further shortage in mid-2012 due to manufacturing problems.

This form of testosterone has long been a popular choice of anabolic steroid among bodybuilders while bulking.

Synonyms/brands

 * Durateston
 * Durandrone Forte
 * Sustanon prolongatum
 * Prarbolan