Medical uses
Testosterone cypionate is used primarily in androgen replacement therapy. It is currently FDA approved for the treatment of primary or hypogonadotropic hypogonadism (either congenital or acquired). Its safety in andropause (late-onset hypogonadism in men) has not yet been established. It is currently used off-label for breast cancer, breast disorders, delayed puberty in boys, oligospermia (low sperm count), hormone replacement therapy in transgender men, and osteoporosis.
Non-medical uses
Testosterone Cypionate, known to steroid users as just Test Cyp is the synthetic version of the naturally produced testosterone hormone. As we all know, this hormone is responsible for a whole lot in the male body. Testosterone promotes a man’s sex drive, helps with fat loss as well as gaining lean muscle mass, increases bone density and could even help in protecting against heart disease. Those who have been in the game for a long time know that Testosterone is the “father” of all anabolic steroids used by bodybuilders and athletes today.
Pharmacokinetics
The pharmacokinetics of testosterone cypionate via depot intramuscular injection, including its elimination half-life and duration of action, are said to be extremely comparable to and hence essentially the same as those of testosterone enanthate. As such, testosterone cypionate and testosterone enanthate are considered to be “functionally interchangeable” as medications. For reference, testosterone enanthate has an elimination half-life of 4.5 days and a mean residence time of 8.5 days and requires frequent administration of approximately once per week. Large fluctuations in testosterone levels result with it, with levels initially being elevated and supraphysiological. The pharmacokinetics of testosterone cypionate have been studied and reported.