Shreegoline (Cabergoline) is used to treat hyperprolactinemia (high levels of prolactin, a natural substance that helps breast-feeding women produce milk but can cause symptoms such as infertility, sexual problems, and bone loss in women who are not breast-feeding or men). Shreegoline is in a class of medications called dopamine receptor agonists. It works by decreasing the amount of prolactin in the body.Excess production of prolactin hormone is due to unknown causes or abnormal growths in the pituitary. This medicine helps in preventing infertility, sexual problems, and bone loss caused by excess prolactin production in men and in women who are not breastfeeding. It is also used as a second line therapy in the treatment of signs and symptoms of Parkinson's disease along with carbidopa-levodopa or as a single agent in case of failure of or intolerance to a non-ergot compound.