A Study to Determine if BHV-8000 is Effective, Safe and Tolerable as a Treatment for Adults Living With Early Parkinson's Disease

Eligibility Criteria

• * Male or female participants 40 to 85 years of age, inclusive, at the time of informed consent.
• * Meet the diagnostic criteria for "Probable PD" as assessed on the Movement Disorder Society (MDS) Clinical Diagnostic Criteria for PD as assessed by the Investigator.
• * Have a clinician-documented diagnosis of idiopathic PD with an onset within 2 years of the Screening Visit
• * Medical history indicating a Parkinsonian syndrome other than idiopathic PD, including, but not limited to, progressive supranuclear gaze palsy, multiple system atrophy, drug-induced Parkinsonism, essential tremor, or primary dystonia.
• * Diagnosis of clinically significant central nervous system (CNS) disease other than PD.
• * Participants who are current smokers (defined as smoking \[in any form, e.g., tobacco smoke, electronic cigarettes, etc.\] within 6 months prior to the Baseline Visit).
• * Treatment with PD medication(s) for a total of more than 28 days or treatment with any PD medication within 90 days of the Baseline Visit.
• * Any other condition(s) that may compromise participant safety, interfere with study conduct, or jeopardize the potential proper interpretation of study results, in the opinion of the investigator.