Triptorelin is a decapeptide synthetic analogue gonadotropin-releasing hormone (GnRH). It decreases pituitary secretion of gonadotropins luteinizing hormone and follicle-stimulating hormone, which decreases testosterone levels. Triptorelin is also used in the treatment of hormone-responsive cancers such as prostate cancer or best cancer, estrogen-dependent conditions and in assisted reproduction. It treats the symptoms of prostate cancer but not the cancer itself. Moreover, doctors also use this medication for gender identity disorder.