Abstract

To confirm the superiority of transdermal rotigotine up to 16mg/24h over placebo, and non-inferiority to ropinirole, in Japanese Parkinson's disease (PD) patients on concomitant levodopa therapy. This trial was a randomized, double-blind, double-dummy, three-arm parallel group placebo- and ropinirole-controlled trial. Four-hundred and twenty PD patients whose motor symptoms were not well controlled by levodopa treatment were randomized 2:2:1 to receive rotigotine, ropinirole (up to 15mg/day) or placebo during a 16-week treatment period followed by a 4-week taper period. The primary variable was change in the Unified Parkinson's Disease Rating Scale (UPDRS) Part III (ON state) sum score from baseline to the end of the treatment period. The difference in the change in the UPDRS Part III (ON state) sum score from baseline to the end of treatment between rotigotine and placebo groups was-6.4±1.2 (95% CI:-8.7 to-4.1; p<0.001), indicating superiority of rotigotine over placebo. The difference between rotigotine and ropinirole groups was-1.4±1.0 (95% CI:-3.2 to 0.5), below the non-inferiority margin, indicating the non-inferiority of rotigotine to ropinirole. Application site reaction was seen in 57.7% of the patients in the rotigotine group and in 18.6% in the ropinirole group (P<0.001). No other safety issue was noted. Rotigotine was well tolerated at doses up to 16mg/24h and showed similar efficacy to ropinirole except that the application site reaction was much higher in the rotigotine group.

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