This is a multicenter, open-label trial to assess safety and tolerability of rotigotine (SPM 936) in subjects with idiopathic Restless Legs Syndrome (RLS), administered at an optimal dose for up to 1 year. Subjects who successfully completed the Maintenance Period and the Taper Period of SP792 are allowed to enroll in this trial.

All subjects will begin the Titration Period at a daily dosage of 1.125mg rotigotine (2.5cm2 patch). Subjects will be up-titrated at 7-day intervals in 1.125mg (2.5cm2 increments, initial titration step only) and 2.25mg intervals (5cm2) increments to a maximum dose of 6.75mg/day (15cm2) rotigotine. The maximum length of titration is 28 days (±3 days), although not all subjects will require 28 days to reach their optimal dose.

A subject's dose may be increased or decreased, as needed by the investigator to maintain a subject's effective dose during the Maintenance Period. A Taper Period is provided to allow for safe, gradual withdrawal from trial medication

Inclusion Criteria:

• Idiopathic restless legs syndrome

Exclusion Criteria:

• Subject has an ongoing serious adverse event from SP792 that is assessed to be related to the trial medication by the investigator and/or the sponsor.
• Subject is pregnant, nursing, or is a woman of child-bearing potential who is not surgically sterile, 2 years postmenopausal, or does not consistently use 2 combined effective methods of contraception, including at least 1 barrier method, unless sexually abstinent.
• Subject has any medical or psychiatric condition that, in the opinion of the investigator, can jeopardize or would compromise the subject's ability to participate in this trial.