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.
China
Researchers investigate the safety and effects of tenofovir disoproxil fumarate on movement symptoms in early Parkinson’s.
Testing a treatment or activity
Ages 18 years to 65 years · Does not accept healthy volunteers
Canada
Researchers analyse movement patterns to investigate whether they can distinguish Parkinson’s from other conditions at an early stage.
Learning by observing or collecting information
Ages 50 years to 75 years · Also accepts healthy volunteers
Turkey
Researchers compare different instructions about what to focus on during rehabilitation for walking and balance in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 70 years · Also accepts healthy volunteers
United States
Researchers test the accuracy, comfort and safety of a sensor designed to measure levodopa levels in real time in people with Parkinson’s.
Testing a treatment or activity
Ages 40 years to 85 years · Does not accept healthy volunteers
United States
Researchers investigate tenapanor for constipation in conditions involving alpha-synuclein, a protein linked to Parkinson’s.
Testing a treatment or activity
Ages 50 years to 89 years · Does not accept healthy volunteers
Belgium
Researchers compare imaging methods for assessing nerves supplying the heart, to help distinguish Parkinson’s and related brain conditions.
Testing a treatment or activity
Ages 18 years to 85 years · Also accepts healthy volunteers
United Kingdom
Researchers collect eye movement, pupil and walking data to develop computer tools for identifying and monitoring Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Also accepts healthy volunteers
Israel
Researchers develop measures for patients and clinicians to describe the severity of freezing of gait in Parkinson’s.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Czech Republic
Researchers investigate a phone app that supports breathing-out muscle exercises aimed at improving cough in Parkinson’s.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
China
Researchers test stimulation of a nerve through the skin of the ear in early Parkinson’s, comparing it with a control treatment.
Testing a treatment or activity
Ages 55 years to 75 years · Does not accept healthy volunteers
United States
Researchers investigate treatment to lower raised blood homocysteine, a substance made by the body, in people with Parkinson’s taking levodopa.
Testing a treatment or activity
Ages 40 years to 90 years · Does not accept healthy volunteers
Turkey
Researchers compare people with Parkinson’s and healthy volunteers to study balance confidence and fear of moving.
Learning by observing or collecting information
Ages 50 years to 80 years · Ask the team who can join
Netherlands
Researchers study the control of breathing in people with Parkinson’s to better understand breathing difficulties.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
China
Researchers compare two ways of controlling deep brain stimulation, including symptom effects, adjustment needs, battery use and patient satisfaction.
Testing a treatment or activity
Ages 18 years to 75 years · Does not accept healthy volunteers
Israel
Researchers test a seated rehabilitation system combining robots, music and games that involve movement and thinking for people with Parkinson’s.
Testing a treatment or activity
Ages 50 years to 75 years · Does not accept healthy volunteers
Mexico
Researchers compare protein deposits in small skin samples from people with conditions affecting the brain and nervous system.
Learning by observing or collecting information
Age 45 years and over · Also accepts healthy volunteers
France
Researchers investigate a substance measured in blood as a possible way to help identify early Parkinson’s and follow changes over time.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Argentina
Researchers investigate cannabidiol, also known as CBD, for symptoms of Parkinson’s.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
Switzerland
Researchers study brain activity during movement in Parkinson’s to learn more about walking difficulties and possible future personalised treatments.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
China
Researchers use imaging and other assessments to investigate probiotics in people with Parkinson’s who act out their dreams during sleep.
Testing a treatment or activity
Ages 40 years to 85 years · 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: 2026-10-13
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.