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

September 15, 2026 updated by: Biohaven Therapeutics Ltd.

A Phase 2/3, Double-Blind, Placebo-Controlled Study of BHV-8000 in Participants With Early Parkinson's Disease

A study to determine if BHV-8000 is efficacious, safe and tolerable in adults diagnosed with early Parkinson's disease. The study will consist of a 48-week double-blind treatment phase followed by a 48-week open-label phase.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
550

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • Alabama
      • Birmingham, Alabama, United States, 35294
        • Recruiting
        • Site-049
    • California
      • Irvine, California, United States, 92618
        • Recruiting
        • Site-003
      • Los Angeles, California, United States, 90033
        • Recruiting
        • Site-041
    • Colorado
      • Aurora, Colorado, United States, 80045
        • Recruiting
        • Site-025
    • Connecticut
      • Farmington, Connecticut, United States, 06030
        • Recruiting
        • Site-031
      • New Haven, Connecticut, United States, 06510
        • Recruiting
        • Site-028
    • Florida
      • Atlantis, Florida, United States, 33462
        • Recruiting
        • Site-038
      • Boca Raton, Florida, United States, 33486
        • Recruiting
        • Site-017
      • Maitland, Florida, United States, 32751
        • Recruiting
        • Site-051
    • Illinois
      • Chicago, Illinois, United States, 60611
        • Recruiting
        • Site-027
    • Massachusetts
      • Boston, Massachusetts, United States, 02114
        • Recruiting
        • Site-071
      • Foxborough, Massachusetts, United States, 02035
        • Recruiting
        • Site-004
    • Michigan
      • Farmington Hills, Michigan, United States, 48334
        • Recruiting
        • Site-015
    • Missouri
      • Chesterfield, Missouri, United States, 63005
        • Recruiting
        • Site-044
    • New York
      • Albany, New York, United States, 12208
        • Recruiting
        • Site-006
      • New York, New York, United States, 10021
        • Recruiting
        • Site-005
    • Oregon
      • Portland, Oregon, United States, 97210
        • Recruiting
        • Site-091
    • Texas
      • Round Rock, Texas, United States, 78681
        • Recruiting
        • Site-043
    • Virginia
      • Henrico, Virginia, United States, 23233
        • Recruiting
        • Site-009
      • Newport News, Virginia, United States, 23601
        • Recruiting
        • Site-074
    • Washington
      • Bellevue, Washington, United States, 98007
        • Recruiting
        • Site-007
      • Seattle, Washington, United States, 98122
        • Recruiting
        • Site-019

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

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.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: BHV-8000 10 mg

Double-blind (DB) Phase (Randomization through Week 48): Participants will receive blinded IP.

Open-label Phase: Participants will receive BHV-8000.
Drug: BHV-8000 10mg
taken orally
Drug: BHV-8000 20 mg
taken orally
Drug: Placebo
taken orally
Experimental: BHV-8000 20 mg

Double-blind (DB) Phase (Randomization through Week 48): Participants will receive blinded IP.

Open-label Phase: Participants will receive BHV-8000.
Drug: BHV-8000 10mg
taken orally
Drug: BHV-8000 20 mg
taken orally
Drug: Placebo
taken orally
Placebo Comparator: Placebo

Double-blind (DB) Phase (Randomization through Week 48): Participants will receive blinded IP (matching placebo).

Open-label Phase: Participants will receive BHV-8000.
Drug: BHV-8000 10mg
taken orally
Drug: BHV-8000 20 mg
taken orally
Drug: Placebo
taken orally

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Time to first qualifying worsening event on Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Part II
Time Frame: Up to 48 Weeks
To evaluate the efficacy of BHV-8000 compared to placebo. This objective is measured by assessing the time to prespecified worsening on MDS-UPDRS Part II (motor experiences of daily living per self-administered questionnaire). MDS-UPDRS Part II is a 52-point scale with a higher total score representing more severe disability.
Up to 48 Weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Part III from Baseline to Week 48 of the DB Phase
Time Frame: Baseline to Week 48
To evaluate the efficacy of BHV-8000 compared to placebo. This objective is measured by assessing the change in MDS-UPDRS Part III (motor examination conducted by rater). MDS-UPDRS Part III is a 132-point scale with a higher total score representing a greater degree of motor impairment.
Baseline to Week 48
Change in Clinical Global Impression of Severity (CGI-S) from Baseline to Week 48 of the DB Phase
Time Frame: Baseline to Week 48
To evaluate the efficacy of BHV-8000 compared to placebo. This objective is measured by assessing the change in severity of a participant's illness as determined by the managing clinician. The CGI-S is a 7-point scale (1 - 7) with 7 representing the most extremely ill participants.
Baseline to Week 48
Change in DaT-SPECT scan from Baseline to Week 48 of the DB Phase
Time Frame: Baseline to Week 48
To evaluate the efficacy of BHV-8000 compared to placebo. This objective is measured by change in DaT-SPECT Striatal Binding Ratio (SBR) in the putamen (assessing the activity of the dopamine transporters). Reduced uptake of the radiotracer is indicative of a decreased number of dopamine-secreting cells and suggestive of disease progression.
Baseline to Week 48
Change in Parkinson's Disease Composite Score - Function (PARCOMS-Function) from Baseline to Week 48 of the DB Phase
Time Frame: Baseline to Week 48
To compare the efficacy of BHV-8000 compared to placebo. This objective is measured by changes in the Parkinson's Disease Composite Score - Function (PARCOMS-Function) score. The PARCOMS-Function is a composite of select items taken from the MDS-UPDRS Part II and the PDQ-39© (assessing ability to complete daily activities). The PARCOMS-Function is a 100-point scale (0 - 100) with higher scores representing greater dysfunction.
Baseline to Week 48
Number of Participants with Deaths, Serious AEs (SAEs), AEs Leading to Study Drug Discontinuation, and moderate or severe AEs
Time Frame: Up to 96 weeks
To assess the safety and tolerability of BHV-8000. This objective will be measured by assessing the number of unique participants with deaths, SAEs, AEs leading to discontinuation, and moderate and severe AEs
Up to 96 weeks
Number of participants with clinically significant laboratory abnormalities
Time Frame: Up to 96 weeks
To assess the safety and tolerability of BHV-8000. This objective will be measured by assessing the number of unique participants with treatment-emergent Grade 3 and 4 laboratory abnormalities
Up to 96 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Biohaven Therapeutics Ltd.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 28, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 1, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 9, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 9, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 16, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 17, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 15, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • BHV8000-301
  • 2025 (U.S. NIH Grant/Contract: Faculty of Social Sciences Scientific Grant at the University of Gdańsk)
  • 2025-521113-13-00 (Ctis)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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