Long-term Open-label Trial in Idiopathic Restless Legs Syndrome (RLS)

Inclusion Criteria: * Subject has completed the preceding trial SP709 (NCT00243217) Exclusion Criteria: * Subject did suffer from a serious adverse event during trial SP709 (NCT00243217) which is ongoing at the end of that trial and is assessed to be related to the study medication by the investigator and/or the Sponsor * Sleep disturbances * Further clinically relevant concomitant diseases such as polyneuropathy, akathisia, claudication, varicosis, muscle fasciculation, painful legs and moving toes, or radiculopathy * Other central nervous diseases * One psychotic episode since start of study SP709 * Any medical or psychiatric condition, which in the opinion of the investigator can jeopardize or would compromise the subject's ability to participate in this trial * Clinically relevant cardiac dysfunction and arrhythmias * The subject has at entry in study SP710, a QTc interval ≥ 500 msec and/or a QTc interval which has increased by ≥ 60 msec as compared to the average baseline (Visit 2) QTc interval of study SP709 * Subject has clinically relevant renal dysfunction (serum creatine ≥ 2.0 mg/dl) * Subject has clinically relevant hepatic dysfunction (total bilirubin \> 2.0 mg/dl or ALT and/or AST greater than two times the upper limit of the reference range * Subject has a newly diagnosed or relapsing neoplastic disease since the start of study SP709 * Subject has a known hypersensitivity to any components of the trial medication or comparative drugs as stated in this protocol * Subject needs drugs prohibited in the course of this trial: neuroleptics, bupidine, hypnotics, antidepressants, anxiolytic drugs, anticonvulsive therapy, psychostimulatory drugs, other L-Dopa or dopamine agonist therapy, opioids, benzodiazepines, MAO inhibitors, sedative antihistamines, amphetamines * Subject is abusing alcohol or drug since start of SP709 * Subject is pregnant or nursing or woman of child-bearing potential who is not surgically sterile, two years postmenopausal, or does not practice two combined methods of contraception, unless sexually abstinent * Subject pursues shift work or is subject to other continuous non-disease-related life conditions which do not allow regular sleep at night * Subject has clinically relevant vasculopathies (eg, varix or arteriosclerosis) * Subject has significant skin hypersensitivity to adhesive or other transdermals or recent unresolved contact dermatitis * Subject has symptomatic orthostatic hypotension, or a systolic blood pressure (SBP) less tham 105mmHg and/or a drop in SBP of \> 20mmHg or a drop of \> 10mmHg in diastolic BP (DBP) on standing at baseline visit (Visit 1)