The FDA-approved dopaminergic medication cabergoline (Dostinex®) is a potent D2R agonist (Ki=0.7) that is used in the treatment of high prolactin levels [64], Parkinson’s disease [65], ovarian hyperstimulation syndrome [66], Cushing’s disease [67], and restless legs syndrome [68]. The gene discussed is PRL; the disease is restless legs syndrome.