Efficacy, Safety and Tolerability of Rotigotine Nasal Spray for the Acute Treatment of RLS Symptoms

• Average Numeric Symptom Severity Score After Single Dose of Rotigotine Nasal Spray or Matching Placebo [ Time Frame: 4 hours post-treatment period at each treatment day ] [ Designated as safety issue: No ]
  Subjects rate the severity of the RLS symptoms at the start of each pre dose and post dose Suggested Immobilization Test (SIT-0 to SIT-6) and every 5min during each SIT, using a numeric symptoms severity scale, where 0=not severe and 10=very severe.
  
  
• Average PLMWI (Periodic Leg Movement Index During Wakefulness) After Single Dose of Rotigotine Nasal Spray or Matching Placebo. [ Time Frame: 4 hours post-treatment period at each treatment day ] [ Designated as safety issue: No ]
  The Periodic Limb Movement (PLM) during Wakefulness Index (PLMWI) measures the number of limb movements per hour and indicates the frequency of PLMs when the subject is awake and the degree of motor symptoms of the disorder during wake time. No movements would result in a score of 0 PLM per hour. Outcome is the average movements per hour in the 4 hour post-dose period per subject.
  
  

Each patient of the placebo and rotigotine group performed an Eligibility Assessment, as well 4 treatment days at which subjects performed a repeated 'Suggested Immobilization Test' (SIT) during a 30min pre-dose and a 4 hours post-dose period. During these periods the severity of RLS symptoms in the legs was assessed by the subject using a numeric symptom severity scale.

In addition the leg movements were measured by actigraphy to assess the Periodic Leg Movement Index during Wakefulness (PLMWI, PLM per hour). Subjects applied a single dose of treatment on each treatment day (placebo nasal spray or rotigotine nasal spray in 3 ascending doses).