TESTOSTERONE THERAPY Testosterone Cypionate - an ester of testosterone, having the same actions as the free alcohol but a prolonged duration of effect; used chiefly in the treatment of male hypogonadism, frigidity, and inoperable female breast cancer, to suppress lactation, and as an anabolic agent, administered by intramuscular injection.Called also t. cyclopentylpropionate.Builds Lean MuscleImproves MemoryImproves