This is an exploratory, double blinded cross-over study of the D1 antagonist ecopipam treat patients currently having dopamine agonist induced augmentation in restless legs syndrome. Each arm is 6 weeks composed of an unforced titration up to 100mg/day separated by a 2-week wash-out period. Efficacy points will include the IRLS, augmentation scales, sleep scales, clinical impressions and fatigue/mood scales.