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

Key Inclusion Criteria:

* Male or female participants 40 to 80 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

Key Exclusion Criteria:

* 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 \[in any form, e.g., tobacco smoke, electronic cigarettes, etc.\] )
* Treatment with PD medication(s)
* 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.