Description

Testosterone cypionate is a long-acting testosterone ester used in testosterone replacement therapy (TRT). Similar to testosterone enanthate, it is administered by intramuscular injection, where the cypionate ester allows for a slow and sustained release of testosterone into the bloodstream.

It was introduced in the 1950s and remains a standard treatment for male hypogonadism (low testosterone levels). Testosterone cypionate is most commonly prescribed in the United States, whereas testosterone enanthate is more widely used in Europe.

Pharmacology:

• Form: Injectable (oil-based solution)

• Ester: Cypionate (long-acting)

• Half-life: ~7–8 days (effects last ~10–14 days)

• Class: Testosterone derivative, androgen, anabolic steroid

• Properties: Strong androgenic and anabolic effects; converts to estrogen via aromatase

Medical Applications:

• Treatment of male hypogonadism (low testosterone)

• Delayed puberty in adolescent boys

• Hormone therapy for transgender men

• Occasionally used in some hormone-related disorders