*A 36-week, multicenter, double-blind, cross-over study of 161 patients with early Parkinson's disease that compared REQUIP XL with immediate-release ropinirole.
As monotherapy, once-daily REQUIP XL demonstrated withdrawal rates due to adverse events comparable to immediate-release ropinirole

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As adjunctive therapy, once-daily REQUIP XL demonstrated withdrawal rates due to adverse reactions comparable to placebo