Ropinirole Patch Versus Placebo, Ropinirole Extended-Release Tablet in Advanced Parkinson's Disease

Abstract

Background: A dopamine agonist patch is an important treatment option for PD. Objectives: A randomized, double-blind, parallel-group, placebo-controlled trial was conducted to evaluate superiority of ropinirole hydrochloride patch over placebo and noninferiority to ropinirole hydrochloride extended-release tablet. Methods: PD patients using levodopa received ropinirole patch (up to 64 mg/d), ropinirole tablets (up to 16 mg/d), or placebo once-daily (double-dummy technique). The primary endpoint was the change from baseline in the total score for the UPDRS Part III (on state) at week 16. Results: The change of the least squares mean (95% confidence interval) in the UPDRS Part III total score was –9.8 (–10.8 to –8.7) with ropinirole patch, –4.3 (–5.8 to –2.8) with placebo, and –10.1 (–11.2 to –9.1) with ropinirole tablet. The difference between the ropinirole patch and placebo groups was –5.4 (–7.3 to –3.6), demonstrating superiority of the patch over placebo. The difference between the ropinirole patch and tablet groups was 0.3 (–1.2 to 1.8). The upper limit of the 95% confidence interval was smaller than the noninferiority limit of 2.5, demonstrating noninferiority of ropinirole patch to ropinirole tablet. In all three groups, most adverse events were mild or moderate and there were no serious safety concerns. Conclusions: Once-daily ropinirole patch was effective in advanced PD patients, having demonstrated superiority over placebo and noninferiority to ropinirole tablet, without causing serious safety problems. Ropinirole patch can be an alternative option for PD patients. © 2020 International Parkinson and Movement Disorder Society.