This is a multicenter, randomized, double-blind, placebo-controlled, parallel group, phase 2/3 study to evaluate the efficacy and safety of TVP-1012 as an add-on to levodopa in Japanese participants with Parkinson's disease with wearing-off phenomenon.~The study period consisted of a 28-week trial period. The participants who fulfilled the inclusion criteria and did not meeting any of the exclusion criteria were enrolled, and randomized in a 1:1:1 ratio to the 0.5 mg of TVP-1012, the 1 mg of TVP-1012, or the placebo group. In each treatment group, participants received 0.5 mg of TVP-1012, 1 mg of TVP-1012, or placebo once daily in a double-blinded manner.
The purpose of this study is to evaluate the efficacy and safety of TVP-1012 (0.5 mg or 1 mg/day) as an add-on to levodopa in Japanese participants with Parkinson's disease with wearing-off phenomenon.