The clinical program included 1309 patients with moderate-to-severe RLS. The efficacy of NEUPRO in the treatment of Restless Legs Syndrome (RLS) was primarily evaluated in two randomized, double-blind, placebo-controlled, fixed-dose trials with maintenance periods of 6 months duration. Patients received NEUPRO doses ranging from 0.5 mg/24 hours to 3 mg/24 hours or placebo once daily. In these two trials, the mean duration of RLS was 2.1 to 3.1 years, mean age was approximately 55 years (range 19-78 years), approximately 68% were women, and 97% were Caucasian. In both trials, patches were applied to different application sites including the abdomen, thigh, hip, flank, shoulder, and/or upper arm and patch application sites were rotated on a daily basis.

The two outcome measures used to assess the effect of treatment as co-primary efficacy endpoints were the International RLS Rating Scale (IRLS Scale) and a Clinical Global Impression - Improvement (CGI-I) assessment. The IRLS Scale contains 10 items designed to assess the severity of sensory and motor symptoms, sleep disturbance, daytime somnolence, and impact on activities of daily living and mood associated with RLS. The range of scores is 0 to 40, with 0 being absence of RLS symptoms and 40 the most severe symptoms. The CGI-I is designed to assess clinical progress (global improvement) on a 7-point scale.

RLS-1

This trial was a multicenter, five-arm, parallel-group, fixed-dose trial of NEUPRO in subjects with moderate-to-severe RLS. A total of 505 subjects were randomized in this trial, participating at approximately 50 sites in the U.S. Subjects received placebo or NEUPRO (0.5 mg/24 hours, 1 mg/24 hours, 2 mg/24 hours, 3 mg/24 hours). Subjects began treatment at a daily dosage of 0.5 mg/24 hours NEUPRO and were titrated over a 4-week period to their assigned daily dose followed by a 6-month maintenance period and 7-day down titration period.

Mean baseline IRLS sum score were similar among all treatment groups (23.5, 23.1, 23.2, 23.3, and 23.6 for the placebo, NEUPRO 0.5 mg/24 hours, 1 mg/24 hours, 2 mg/24 hours, and 3 mg/24 hours groups, respectively).

Patients experienced a mean change in the IRLS sum score from baseline to the end of treatment for each of the four NEUPRO dose groups. The mean changes from baseline and differences from placebo in IRLS sum score and CGI Item 1 are shown for each treatment group in Table 10. The difference between the two highest treatment groups (2 mg/24 hours and 3 mg/24 hours) and placebo were statistically significant. Of the NEUPRO-treated patients, 23% had an IRLS score of 0 compared to 9.1% of placebo patients at the end of the maintenance period. Onset of treatment benefit was seen with the 1 mg/24 hours dose.

RLS-2

This trial was a multicenter, four-arm, parallel-group trial of NEUPRO in subjects with moderate-to-severe RLS. A total of 458 subjects were randomized in this trial, participating at approximately 50 sites in 8 European countries. Patients received placebo or NEUPRO (1 mg/24 hours, 2 mg/24 hours, 3 mg/24 hours). Patients began treatment at a daily dosage of 1 mg/24 hours NEUPRO and were titrated over a 3-week period to their assigned daily dose followed by a 6-month maintenance period and 7-day down-titration period.

Mean baseline IRLS sum score were similar among all treatment groups (28.1, 28.1, 28.2, and 28.0 for the placebo, NEUPRO 1 mg/24 hours, 2 mg/24 hours, and 3 mg/24 hours groups, respectively). Patients experienced a mean change in the IRLS sum score from baseline to the end of treatment for each of the three NEUPRO dose groups. The mean changes from baseline and differences from placebo in IRLS sum score and CGI Item 1 are shown for each treatment group in Table 11. The difference between all three treatment groups (1 mg/24 hours, 2 mg/24 hours, and 3 mg/24 hours) and placebo were statistically significant. Of the NEUPRO-treated patients, 24% had an IRLS score of 0 compared to 12% of placebo patients at the end of the maintenance period. Onset of treatment benefit was seen with the 1 mg/24 hours dose.