Comparison of Treatment Outcome of Cabergoline According to Target Prolactin Levels in Patients With Prolactinoma

Inclusion Criteria: * Adults, male or female aged 19 years or older * diagnosed with prolactinoma * No previous history of surgery, medication, or radiation therapy Exclusion Criteria: * Invasive prolactinomas except invading cavernous sinus * Taking dopaminergic medications * Taking medications that can affect serum prolactin level (including estrogenic hormone, oral contraceptive drugs, intrauterine devices) * Hyperprolactinemia due to secondary causes * History of pituitary apoplexy within the last 3 months * Patients with mental illness that should avoid dopamine agonists * Patients with history of cardiac valve diseases * Patients with history of pulmonary fibrosis, retroperitoneal fibrosis, and cystic fibrosis * Moderate degree of hepatic or renal insufficiency (IDMS Modification of Diet in Renal Disease glomerular filtration rate (MDRD GFR) \<45 ml/min/1.73m2) * Patients with cabergoline hypersensitivity reaction * Pregnant or breast feeding patients