Cabergoline or Dostinex or just Caber for short treats high levels of prolactin in your body, in women this means unwanted breast milk, missed periods, and difficulty becoming pregnant.  In men high prolactin levels causes reduced libido and increase time between orgasm as well as the development of breasts.  High prolactin levels interferes with the function of the testicles in men and sperm production resulting as well in difficulting in getting an erection as well as breast tenderness and enlargement. 

Cabergoline or Dostinex treats high levels of prolactin by stopping the release of prolactin by the brain into the blood.   Cabergoline is used to treat hyperprolactinemia a condition which is characterized by high levels of prolactin.  Further people with pituitary gland issues can benefit from taking cabergoline to combat too much prolactin in their bodies.  Many body builders who take anabolic steroids suffer from elevated levels of prolactin and use cabergoline to halt the release of prolactin.