The purpose of this study is to assess the efficacy and safety of ropinirole XR in the treatment of adults with Restless Legs Syndrome (RLS).

Inclusion criteria:

• Diagnosed with RLS using the International RLS Study Group Diagnostic Criteria with a total score of 15 or greater on the International RLS Rating Scale.
• Have evening and nighttime symptoms of RLS, significant sleep impairment due to RLS symptoms, and symptoms requiring treatment prior to bedtime, but no earlier than 5:00PM.

Exclusion criteria:

• Have secondary RLS.
• Have any medical conditions that may impact efficacy assessments or that may present a safety concern.

Patient-level data for this study will be made available through www.clinicalstudydatarequest.com following the timelines and process described on this site.