Caberlin 0.5 mg Buy caberlin 0.5 mg, is used for treating disorders that are associated with high levels of the hormone prolactin. This could either be due to tumors in the pituitary gland or unknown reasons. Cabergoline is a dopamine receptor agonist. This drug basically works by blocking the prolactin secretion from the pituitary gland. Patients who are allergic to any ingredients found in Cabergoline should not take the drug.