testosterone isocaproate

Testosterone isocaproate is a **small-molecule androgen ester** of testosterone in which testosterone is esterified with isocaproic acid to prolong release after intramuscular administration. It functions as a **prodrug of testosterone** and exerts its pharmacologic effect after hydrolysis to testosterone, which **agonizes the androgen receptor** to restore androgen signaling. The agent has been used in **androgen replacement therapy**, particularly for **male hypogonadism**, and is best known as one component of the multi-ester testosterone product **Sustanon 250** originally developed by **Organon**. As a distinct substance, testosterone isocaproate is not itself a combination drug, but a specific testosterone ester formulation component intended to provide a sustained release profile relative to unesterified testosterone.

Other names

testosterone isocaproatetestosterone 17beta isocaproatetestosterone17beta isocaproatetestosterone-17beta isocaproatetestosterone 17beta 4 methylvaleratetestosterone17beta 4 methylvaleratetestosterone-17beta 4 methylvalerate