Testosterone stearate, also known as testosterone octadecanoate, testosterone 17β-stearate, and androst-4-en-17β-ol-3-one 17β-stearate, is an injected anabolic-androgenic steroid (AAS) and an androgen ester – specifically, the C17β stearate (octadecanoate) ester of testosterone – which was never marketed.[1][2] It is a prodrug of testosterone and, when administered via intramuscular injection, is associated with a long-lasting depot effect and extended duration of action.[1] Testosterone stearate may occur naturally in the body.[3]
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Other names | Testosterone octadecanoate; Testosterone 17β-stearate; Androst-4-en-17β-ol-3-one 17β-stearate |
Routes of administration | Oral, intramuscular injection |
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Chemical and physical data | |
Formula | C37H62O3 |
Molar mass | 554.900 g·mol−1 |
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It has been said that with longer-chain esters of testosterone like testosterone stearate, the duration of action may be so protracted that the magnitude of effect with typical doses may be too low to be appreciable.[1]