 To be included, patients had to have: 1 a total score of 15 or greater on the International RLS Rating Scale; 2 evening and nighttime symptoms with sleep impairment by self-report due to RLS; and 3 RLS for at least six months with symptoms at least two to three times per week. The potential was for at least 12 and as many as 42 episodes of RLS during the treatment period. 