Erb and coworkers reported a patient with severe uncontrolled RA that improved rapidly after treatment for coincidental hyperprolactinemia,[9] and Eijsbouts et al. tried on quinagolide for 6 months and despite suppression of PRL level, there was not any improvement in clinical or laboratory findings.[13] This study is the first, clinical trial about cabergoline in RA. Here, PRL is linked to rheumatoid arthritis.