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Testosterone propionate/testosterone cypionate/prasterone (TP/TC/DHEA), sold under the brand name Sten, is an injectable combination medication of testosterone propionate (TP), a fast-acting androgen/anabolic steroid, testosterone cypionate (TC), a long-acting androgen/anabolic steroid, and prasterone (dehydroepiandrosterone; DHEA), an androgen and neurosteroid, which has been used to treat andropause, hypogonadism, and impotence in men and breast cancer, fibrocystic breast disease, and low sexual desire in women.^[1]^[2]^[3]^[4]^[5] It contains 25 mg TP, 75 mg TC, and 20 mg DHEA in 2 mL oil solution provided in ampoules and is administered by intramuscular injection once every 15 to 30 days.^[1]^[3]^[2]^[5] The medication was previously marketed in Mexico but appears to no longer available.^[1]^[3]^[5]^[6] The duration of action of TP/TC/DHEA has been reported to be approximately 15 to 30 days, due to the long-acting TC component.^[1]

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Parenteral durations of androgens/anabolic steroids
Medication	Form	Major brand names	Duration
Testosterone	Aqueous suspension	Andronaq, Sterotate, Virosterone	2–3 days
Testosterone propionate	Oil solution	Androteston, Perandren, Testoviron	3–4 days
Testosterone phenylpropionate	Oil solution	Testolent	8 days
Testosterone isobutyrate	Aqueous suspension	Agovirin Depot, Perandren M	14 days
Mixed testosterone esters^a	Oil solution	Triolandren	10–20 days
Mixed testosterone esters^b	Oil solution	Testosid Depot	14–20 days
Testosterone enanthate	Oil solution	Delatestryl	14–28 days
Testosterone cypionate	Oil solution	Depovirin	14–28 days
Mixed testosterone esters^c	Oil solution	Sustanon 250	28 days
Testosterone undecanoate	Oil solution	Aveed, Nebido	100 days
Testosterone buciclate^d	Aqueous suspension	20 Aet-1, CDB-1781^e	90–120 days
Nandrolone phenylpropionate	Oil solution	Durabolin	10 days
Nandrolone decanoate	Oil solution	Deca Durabolin	21–28 days
Methandriol	Aqueous suspension	Notandron, Protandren	8 days
Methandriol bisenanthoyl acetate	Oil solution	Notandron Depot	16 days
Metenolone acetate	Oil solution	Primobolan	3 days
Metenolone enanthate	Oil solution	Primobolan Depot	14 days
Note: All are via i.m. injection. Footnotes: ^a = TP, TV, and TUe. ^b = TP and TKL. ^c = TP, TPP, TiCa, and TD. ^d = Studied but never marketed. ^e = Developmental code names. Sources: See template.

References

^ ^a ^b ^c ^d "STEN". www.mufel.net. Archived from the original on 12 June 2019. Retrieved 1 September 2022.
^ ^a ^b Diccionario de especialidades farmaceúticas. P.L.M. International (Colombia) Ltda. 2007. p. 194. ISBN 978-968-9266-03-7. Combinado STEN. Prasterona, Testosterona, propionato de Ampolletas. ATLANTIS-3533
^ ^a ^b ^c Llewellyn W (2011). Anabolics. Molecular Nutrition Llc. pp. 650–. ISBN 978-0-9828280-1-4.
^ Sadock BJ, Sadock VA (2010). Kaplan and Sadock's Pocket Handbook of Clinical Psychiatry. Lippincott Williams & Wilkins. pp. 272–. ISBN 978-1-60547-264-5.
^ ^a ^b ^c "Home". micromedexsolutions.com.
^ "Sten". drugs.com.