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.
France
Researchers want to help women with Parkinson’s identify and manage symptom changes linked to hormones, including changes around menstrual periods.
Testing a treatment or activity
Ages 18 years to 56 years · Does not accept healthy volunteers
Spain
Researchers are checking whether a group exercise programme tailored to individuals is practical and useful for people with Parkinson’s in a community setting.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Germany, Japan, Netherlands, United States
Researchers are testing LY3962681 in volunteers with and without Parkinson’s to study safety, unwanted effects and how the body handles the medicine.
Testing a treatment or activity
Ages 30 years to 80 years · Also accepts healthy volunteers
United States
Researchers are studying how different brain areas work together to control movement, including in people with Parkinson’s and other movement disorders.
Testing a treatment or activity
Ages 18 years to 89 years · Does not accept healthy volunteers
United States
Researchers are studying visual hallucinations in Lewy body diseases to understand the brain processes involved and inform future treatment research.
Learning by observing or collecting information
Ages 18 years to 90 years · Also accepts healthy volunteers
France
Participants complete a computer task. Researchers compare people with Parkinson’s who do and do not experience seeing things that are not there.
Learning by observing or collecting information
Ages 18 years to 85 years · Also accepts healthy volunteers
France
Researchers are testing whether a questionnaire gives consistent results when used repeatedly to measure changes in mental and emotional symptoms in Parkinson’s.
Testing a treatment or activity
Ages 30 years to 75 years · Does not accept healthy volunteers
Canada
Researchers compare two ultrasound stimulation approaches and an inactive version, looking at movement and task performance in people with Parkinson’s.
Testing a treatment or activity
Ages 18 years to 90 years · Does not accept healthy volunteers
United States
Researchers compare two strength-training approaches that use changes in lifting speed to guide exercise, measuring strength, power and everyday performance.
Testing a treatment or activity
Ages 50 years to 85 years · Does not accept healthy volunteers
United States
Researchers are testing whether a computer-guided method can find useful brain stimulation settings from a practical number of walking tests.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers are studying whether therapy involving psilocybin changes depression symptoms in people who have Parkinson’s and depression.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
United States
Researchers are checking whether the study medicine BHV-8000 affects early Parkinson’s and whether participants can take it safely and tolerate its effects.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
Spain
Researchers compare four ways of applying radiofrequency therapy to the legs, measuring immediate and short-term changes in stiffness and walking.
Testing a treatment or activity
Ages 55 years to 90 years · Does not accept healthy volunteers
United States
Researchers are comparing groups at different stages of Parkinson’s to understand the role of communication between the digestive system and brain.
Learning by observing or collecting information
Ages 21 years to 80 years · Also accepts healthy volunteers
Australia
Researchers test increasing doses of the study medicine LBT-3627 in volunteers with and without Parkinson’s, checking safety and how well people tolerate it.
Testing a treatment or activity
Ages 30 years to 89 years · Also accepts healthy volunteers
Austria
This early study compares doses of TRB-001 with an inactive treatment in early Parkinson’s, checking safety and how the immune system responds.
Testing a treatment or activity
Ages 40 years to 75 years · Does not accept healthy volunteers
Sweden
Researchers are studying small dissolvable Parkinson’s tablets used with a dispensing device and an optional app that reminds people about doses.
Testing a treatment or activity
Age 30 years and over · Does not accept healthy volunteers
Italy
Researchers compare a brain stimulator that adapts its output with conventional stimulation, checking effects and safety in people with Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Italy
Researchers are studying whether a programme combining movement and thinking tasks is practical for people with Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
China
Researchers are testing a home brain stimulation approach with remote supervision, looking at safety and changes in slow movement, stiffness and walking.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept 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.