Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Parkinson's Disease: early-phase trial registry
42 of 161 indexed Parkinson's Disease trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #67 of 28,707 conditions by registered trial count.
161 US clinical trials · 42 currently recruiting · #67 of 28,707 conditions by registered trial count
Parkinson's Disease: 161 US clinical trials tracked, 42 recruiting.
Parkinson's Disease is the subject of 161 registered US clinical trials on ClinicalTrials.gov, 42 of them currently open to new participants. 21 are in Phase 3-4 (later-stage) and 55 in Phase 1-2 (earlier-stage). The most active sponsor is VA Office of Research and Development, running 16 of these trials.
Enrollment posture brief
Registry condition parkinsons-disease
OPEN 42 | RECR 26% | LATE 21 | EARLY 55 | RANK #67 | SPON 16
Volume-matched condition peers
Nearest open-share peer: Barrett's Esophagus (26% recruiting · 23 trials)
Parkinson's Disease lists 42 open slots (26% of 161 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Parkinson's Disease on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Parkinson's Disease is recruiting below its size-band peers.
42 of 161 indexed trials (26.1%) are open to enrollment, against a 37.1% average across 139 conditions with 100+ trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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Sponsorship of Parkinson's Disease trials is spread across many organizations.
VA Office of Research and Development accounts for 16 of 161 trials (9.9%). 99 distinct sponsors appear on at least one study for this condition label.
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Most Parkinson's Disease trials plan to enrol fewer than 100 people.
Median target enrolment is 51 among the 159 trials that report a genuine target (sentinel values excluded). 100 of those (62.9%) plan for fewer than 100 participants.
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Parkinson's Disease research is mostly interventional.
114 interventional and 47 observational studies make up this index (70.8% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
161 total, page 4 of 4
Study of KW-6002 (Istradefylline) in Parkinson's Disease in Patients With Motor Response Complications on Levodopa
University of Chicago
NCT00203957
Prospective Evaluation of Forceplate Measured Levodopa-Induced Dyskinesia
Oregon Health and Science University
NCT00912977
Transcranial Direct Current Stimulation (tDCS) and Parkinson's Disease
University of Maryland, Baltimore
NCT01100762
Effect of Exercise in Parkinsonism
VA Office of Research and Development
NCT02598973
Pilot Study for Automated Deep Brain Stimulation Programming
Great Lakes NeuroTechnologies
NCT02046863
Relationship Between Symptoms, Retinal Morphology, and the Nigrostriatal Dopamine System in Parkinson's Disease
Thomas Jefferson University
NCT02443779
Effects of Dexmedetomidine on Activity in the Subthalamic Nucleus
University of Wisconsin, Madison
NCT01721460
Subthalamic Deep Brain Stimulation (DBS) in Parkinson's Disease
University of Florida
NCT02012647
State-dependent Pathophysiological Oscillations in Parkinson's Disease and Treatment With Deep Brain Stimulation (DBS)
University of Minnesota
NCT02709148
Parkinson's Disease Treatment With Coenzyme Q10
National Institute of Neurological Disorders and Stroke (NINDS)
NCT00004731
A Multicenter, Open-label Trial to Assess Subject Preference of PARCOPA, Carbidopa/Levodopa Orally Disintegrating Tablets, Compared to Conventional Carbidopa/Levodopa Tablets in Subjects With Stable Parkinson's Disease
UCB Pharma
NCT00139867
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 24 |
| Phase 2 | 31 |
| Phase 3 | 11 |
| Phase 4 | 10 |
Top Sponsors
Named interventions
Most-linked intervention names on Parkinson's Disease records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Parkinson's Disease trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Parkinson's Disease page
161 registered trials, 42 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 42 Parkinson's Disease trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- VA Office of Research and Development sponsors the most Parkinson's Disease trials on record, review their full trial history before evaluating a specific study. See VA Office of Research and Development's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Parkinson's Disease condition card totals 161 registered trials; most-linked intervention Placebo; top US site state California. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.