Description
Testosterone enanthate is a long-acting testosterone ester and one of the most widely used forms of testosterone replacement therapy (TRT). It was first introduced in the 1950s and remains a standard treatment for male hypogonadism (low testosterone levels). It is administered by intramuscular injection, where the enanthate ester allows for slow release of testosterone into the bloodstream.
Pharmacology:
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Form: Injectable (oil-based solution)
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Ester: Enanthate (long-acting)
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Half-life: ~4–5 days (effects last 1–2 weeks)
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Class: Testosterone derivative, androgen, anabolic steroid
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Properties: Strong androgenic and anabolic effects, can convert to estrogen via aromatase
Medical Applications:
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Treatment of male hypogonadism (low testosterone production)
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Management of delayed puberty in adolescent boys
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Used in hormone therapy for transgender men
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Historically used in certain cases of breast cancer in women
