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 2026-10-13 (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 compare pimavanserin and quetiapine in everyday care for people with Lewy body dementia who experience hallucinations or related symptoms.
Testing a treatment or activity
Age range not listed · Does not accept healthy volunteers
China
Researchers investigate PDR001, an experimental treatment intended to help remove a protein associated with Parkinson’s from the brain.
Testing a treatment or activity
Ages 40 years to 65 years · Does not accept healthy volunteers
China
Researchers study the safety and effects of XJN010 nasal spray during periods when usual Parkinson’s medicines no longer control symptoms well.
Testing a treatment or activity
Ages 30 years to 85 years · Does not accept healthy volunteers
France
Researchers test the feasibility of examinations and study procedures before using them in larger research projects.
Testing a treatment or activity
Age 18 years and over · Also accepts healthy volunteers
Brazil
Researchers study remotely supported physical practice and imagined movement practice for freezing of gait in Parkinson’s.
Testing a treatment or activity
Age range not listed · Does not accept healthy volunteers
United States
Researchers study the effects and safety of CREXONT, a longer-acting carbidopa and levodopa medicine, in everyday care.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Germany
Researchers use scalp recordings to measure electrical effects produced by implanted deep brain stimulation devices.
Learning by observing or collecting information
Ages 35 years to 85 years · Does not accept healthy volunteers
Germany
Researchers study a walking and balance programme for people with movement conditions that combines clinic visits with practice at home.
Testing a treatment or activity
Ages 18 years to 75 years · Does not accept healthy volunteers
United States
Researchers investigate the safety and effects of Segway-based training with added sensory feedback on posture and thinking in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 85 years · Does not accept healthy volunteers
United States
Researchers investigate a light-based therapy in people with brain conditions. The study is intended to test its effects, rather than establish a proven treatment.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
France
Researchers test whether training nursing-home staff improves quality of life for residents with Parkinson’s.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Italy
Researchers study tiny particles released by cells into saliva to see whether they could provide useful information about conditions affecting the brain.
Learning by observing or collecting information
Age 45 years and over · Does not accept healthy volunteers
Taiwan
Researchers investigate brain activity during imagined movement and feedback-based training aimed at walking and balance in Parkinson’s.
Testing a treatment or activity
Ages 40 years to 85 years · Also accepts healthy volunteers
Israel, Italy
Researchers study treadmill-based rehabilitation for people with Parkinson’s who experience walking difficulties, including freezing or falls.
Testing a treatment or activity
Age range not listed · Does not accept healthy volunteers
Netherlands, Romania, Sweden
Researchers collect everyday treatment experience with foslevodopa and foscarbidopa infusions, including how delivery rates are adjusted for advanced Parkinson’s.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
China
Researchers study the safety of GM101 injections as a possible treatment approach for Parkinson’s.
Testing a treatment or activity
Ages 40 years to 70 years · Does not accept healthy volunteers
Italy
Researchers investigate walking and balance difficulties in people with rare conditions affecting the nervous system.
Learning by observing or collecting information
Ages 18 years to 80 years · Also accepts healthy volunteers
China
Researchers investigate the safety, tolerability and early effects of NCR201 as a possible treatment for Parkinson’s.
Testing a treatment or activity
Ages 40 years to 75 years · Does not accept healthy volunteers
Bangladesh
Researchers test vitamin D3 in men with Parkinson’s who have low vitamin D levels, including its effects on electrical activity in the brain.
Testing a treatment or activity
Ages 51 years to 70 years · Does not accept healthy volunteers
Bangladesh
Researchers study whether vitamin D3 affects automatic control of heart function in men with Parkinson’s and low vitamin D levels.
Testing a treatment or activity
Ages 51 years to 70 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: 2026-10-13
4689 related source records before matching duplicates
Import available
Last complete check: 2026-10-13
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-13
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.