Each "GP Test Enanth 250" milliliter contains 250mg of Testosterone Enanthate. GP Test Enanth 250 is available in a 10ml multi dose vial. GP Test Enanth 250 is a drug which contains the male sex hormone. GP Test Enanth 250 gives body the needed testosterone or replaces the one made in the body. It is also used during treatment of some types of breast cancer to help fight the effects that estrogen has on cancer. The drug generally slows down the growth rate of the cancer as well.