TAKE PART IN RESEARCH
Research explained in everyday language. Explore what teams around the world are trying to learn, who can take part and how to get in touch.
See worldwide coverage and update dates ↓Studies with early results appear under “Results reported” even if recruitment continues.
Registry records retrieved 2026-10-11 (UTC). Individual records may have older updates. Recruitment and eligibility must be confirmed with the study team.
A location is a starting point. Ask the team whether that site is accepting people and whether you can take part from where you live.
Introductions are AI-written from the registry in everyday language and have not been independently checked by a clinician. Open any study for its full name, original description and participation rules.
Studies name Parkinson’s or a related condition. Some include other conditions or healthy volunteers. Country filters use sites with matching or unreported status. A country recorded by WHO does not confirm an open local site.
United States
Researchers study links between changes in visual attention after implanted brain stimulation and episodes when people with Parkinson’s cannot keep walking.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers are developing and testing a wearable sensor and digital system to support swallowing care in Parkinson’s.
Testing a treatment or activity
Age 22 years and over · Does not accept healthy volunteers
China
Researchers compare different gaps between stimulation sessions with standard medical treatment in people with Parkinson’s.
Testing a treatment or activity
Ages 50 years to 85 years · Does not accept healthy volunteers
United States
This pilot trial studies approaches involving brief increases in carbon dioxide, looking at functions such as breathing, voice and cough.
Testing a treatment or activity
Ages 40 years to 75 years · Does not accept healthy volunteers
France
Researchers combine different ways of reading genetic information to improve diagnosis in people with early-onset or familial Parkinson-like conditions.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers study whether genetic differences influence the relationship between aerobic exercise and changes in Parkinson’s over time.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
People already scheduled for brain stimulation surgery take part in research on Parkinson’s mechanisms and more individualised stimulation.
Testing a treatment or activity
Ages 18 years to 80 years · Does not accept healthy volunteers
France
Researchers follow people through French specialist centres to understand how Parkinson’s changes and identify meaningful differences between groups.
Learning by observing or collecting information
Age 10 years and over · Also accepts healthy volunteers
Netherlands
Researchers measure how common a particular bacterial gene is in people with Parkinson’s and how its activity varies.
Learning by observing or collecting information
Ages 18 years to 80 years · Does not accept healthy volunteers
United States
Researchers compare pimavanserin and quetiapine for Parkinson’s-related psychosis, which can involve seeing things or holding beliefs that do not match reality.
Testing a treatment or activity
Age 40 years and over · Also accepts healthy volunteers
Netherlands
Researchers study the medicine SUL-238 in early untreated Parkinson’s, using a specialised scan and safety assessments to examine its effects.
Testing a treatment or activity
Age 40 years and over · Does not accept healthy volunteers
United States
Researchers study the safety and effects of placing cells grown from reprogrammed human cells into the brain in people with Parkinson’s.
Testing a treatment or activity
Ages 40 years to 75 years · Does not accept healthy volunteers
United States
People with Parkinson’s try a new kind of standing desk in a laboratory so researchers can learn about their experience using it.
Testing a treatment or activity
Age 50 years and over · Does not accept healthy volunteers
United States
Researchers study ways to bring genetic information and testing into care across a diverse health system.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Italy
Researchers compare safinamide with an inactive treatment for pain in people with Parkinson’s whose movement symptoms fluctuate.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Canada
Researchers are investigating whether low-intensity sound waves aimed at the brain can be used to influence brain activity.
Testing a treatment or activity
Ages 18 years to 85 years · Also accepts healthy volunteers
United States
Researchers study whether a tailored amino acid supplement, containing building blocks of protein, affects nutrition, body composition and physical function in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 90 years · Does not accept healthy volunteers
United States
Researchers study different forms and possible biological causes of Parkinson’s beginning before age 50.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
United States
Researchers use repeated specialised brain scans to study changes in people with early Parkinson’s and people with signs that may precede it.
Testing a treatment or activity
Ages 18 years to 99 years · Also accepts healthy volunteers
United States
Researchers use an imaging substance to measure the amount and location of active immune cells in the brains of people being studied for Parkinson’s.
Testing a treatment or activity
Age 30 years and over · Also accepts healthy volunteers
WORLDWIDE COVERAGE
Studies are imported from ClinicalTrials.gov, WHO’s international collection and the European CTIS registry. WHO brings together national and regional registries, including records from Asia, Africa and Latin America. Recruiting and upcoming listings have English introductions; older records awaiting an introduction show their registry title.
We aim for broad worldwide coverage, but no registry includes every study. Unregistered studies, reporting delays and missing translations can leave gaps. A missing paper does not mean that no results exist.
Import available
Last complete check: 2026-10-11
4689 related source records before matching duplicates
Update needs attention; retaining the last complete import
Last complete check: 2026-10-11
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-11
73 related source records before matching duplicates
These dates show when WHO processed a registry’s data, not when every study was last updated. WHO’s “not recruiting” label does not distinguish planned, completed and follow-up studies.
Source attribution: WHO ICTRP ↗. The source records and processing dates remain available on each study page. English registration fields are preferred; original descriptions may include local-language material. Registry imports and paper matching run daily. New or changed descriptions enter an editorial queue.