Overview
The purpose of this study is to evaluate the efficacy, safety, and pharmacokinetics (PK) of RO7568282 compared with placebo in participants with early-stage Parkinson's disease (PD) on stable symptomatic monotherapy with levodopa.
Eligibility
Inclusion Criteria:
- Must be aged 40 to 85 years inclusive
- Diagnosis of idiopathic PD
- Has received stable doses of monotherapy treatment with levodopa for at least 2 months prior to baseline
- Movement Disorder Society - Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Part IV score of 0 at screening and prior to randomization at baseline
- Hoehn and Yahr (H\&Y) Stage ≤ 3 (assessed in off medication state) at screening and prior to randomization at baseline
- Able to swallow whole capsules
Exclusion Criteria:
- Medical history indicating a parkinsonian syndrome other than idiopathic PD
- Diagnosis of PD dementia
- Diagnosis of a significant neurologic disease other than PD
- Within the last year, unstable or clinically significant cardiovascular disease
- Chronic uncontrolled hypertension
- History or presence of brain magnetic resonance imaging (MRI) scan showing evidence of structural abnormalities, other than related to PD
Note: Other protocol-defined inclusion/exclusion criteria also apply
