Testosterone enanthate

Testosterone enanthate
Clinical data
Routes of
Intramuscular injection
Pharmacokinetic data
Biological half-life 4.5 days (intramuscular)[1]
Synonyms NSC-17591
CAS Number 315-37-7
PubChem (CID) 9416
ChemSpider 9045
UNII 7Z6522T8N9
KEGG D00958
Chemical and physical data
Formula C26H40O3
Molar mass 400.60 g·mol−1
3D model (Jmol) Interactive image

Testosterone enanthate (USAN, BAN) (brand names Delatestryl, Testostroval, Testro LA, Andro LA, Durathate, Everone, Testrin, Andropository), or testosterone heptanoate, is an androgen and anabolic steroid and a testosterone ester.[2][3][4] Along with testosterone cypionate and testosterone propionate, it is one of the most widely used testosterone esters.[5] Testosterone enanthate was first introduced in 1952.[6] Administered via intramuscular injection, it is the most widely used form of testosterone in androgen replacement therapy.[6]

Testosterone enanthate has an elimination half-life of 4.5 days and a mean residence time of 8.5 days when used as a depot intramuscular injection.[1] It requires frequent administration of approximately once per week, and large fluctuations in testosterone levels result with it, with levels initially being elevated and supraphysiological.[1]


  1. 1 2 3 Anita H. Payne; Matthew P. Hardy (28 October 2007). The Leydig Cell in Health and Disease. Springer Science & Business Media. pp. 423–. ISBN 978-1-59745-453-7.
  2. J. Elks (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 641–642. ISBN 978-1-4757-2085-3.
  3. Index Nominum 2000: International Drug Directory. Taylor & Francis. January 2000. ISBN 978-3-88763-075-1.
  4. I.K. Morton; Judith M. Hall (6 December 2012). Concise Dictionary of Pharmacological Agents: Properties and Synonyms. Springer Science & Business Media. ISBN 978-94-011-4439-1.
  5. Kicman, A T (2008). "Pharmacology of anabolic steroids". British Journal of Pharmacology. 154 (3): 502–521. doi:10.1038/bjp.2008.165. ISSN 0007-1188.
  6. 1 2 Eberhard Nieschlag; Hermann M. Behre; Susan Nieschlag (13 January 2010). Andrology: Male Reproductive Health and Dysfunction. Springer Science & Business Media. pp. 442–. ISBN 978-3-540-78355-8.

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