An INTERVENTIONAL STUDY (or Clinical Trial) is a clinical study in which participants are assigned an intervention such as a medication, device, or procedure, so that researchers can evaluate its effects on biomedical or health-related outcomes. Participants may receive diagnostic, therapeutic, or other types of interventions. Randomized, placebo-controlled clinical trials are the gold standard for assessing the safety and effectiveness of a therapy. Clinical trial phase definitions
Studies with no phase specified may include evaluations of interventions such as exercise, physical therapy, speech therapy, dietary supplements and more.
Click on buttons below for interactive world maps on ClinicalTrials.gov.
Then click on country/state to view individual trials.
<---- Other terms (optional):
e.g., Phase 1, Phase 2, Phase 3,
Select Country (or leave blank to see all countries), State (U.S. only), City, and Distance. ---->
Phase 3 evaluates therapy safety and efficacy with 100's or thousands of participants.
STEP 2: View list of studies matching criteria. Apply additional filters as needed.
STEP 1. Go to ClinicalTrials.gov and enter search parameters to find studies you may be interested in.
STEP 2. View list of studies matching your criteria and apply additional filters if desired.
STEP 3. Click on a study's title for more info about that study (description, sponsor, eligiblity, locations, contacts, etc.).
View Recruiting PD Trials via Interactive Maps
Click on Download to save search results to a file.
The Charter for Clinical Trials in Parkinson's, published by The Cure Parkinson's Trust & Parkinson's Movement, provides helpful guidelines for potential trial participants.
Apply filters to narrow study search.
Click on Show/Hide Columns button for display options.
An OBSERVATIONAL STUDY collects and analyzes data from participants in order to better understand a disease and to further the development of biomarkers and improved treatments. For example, participants may be asked to complete questionnaires, provide blood or CSF samples, undergo scans, or use a wearable device. Data may be collected at a point in time or longitudinally.
|Phase 1||Phase 2||Phase 3||No Phase||Observational|
Click on 'Search" button to view list of trials matching your criteria (or "Advanced Search" option for more search criteria). ---->
Type Parkinson Disease ---->
STEP 1: Enter search parameters on ClinicalTrials.gov home page.
* 21 trials worldwide (10 U.S.) are combined Phase 1/2 or Phase 2/3
Find Recruiting PD Trials in your Area
Phase 1 evaluates therapy safety with small # participants ( <100).
screenshot from ClinicalTrials.gov home page
Studies matching search criteria
STEP 3: Click on "Study Title" for individual study details.
Click on + to expand filter options.
Phase 2 evaluates therapy safety and efficacy with up to several hundred participants.
Analyzing the Parkinson's disease clinical trial pipeline to facilitate patient collaboration in research.
Phase 4 involves further study of therapies already FDA-approved.
Information about currently recruiting interventional and observational Parkinson's disease studies taking place around the world is available on ClinicalTrials.gov, the world's most comprehensive clinical trial registry. Below you will find tips for using ClinicalTrials.gov to help find recruiting trials you may qualify to participate in. (See ClinicalTrials.gov overview.) Information for each trial includes its description, design, eligibility criteria, sponsor, locations, contact info and more. Further information about any trial can be obtained by contacting the trial coordinator via the contact info provided.