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 test the safety and movement through the body of an experimental PET-scan tracer in healthy volunteers and people with several brain conditions.
Testing a treatment or activity
Ages 18 years to 80 years · Also accepts healthy volunteers
United Kingdom
Researchers in the UK test whether ambroxol, a medicine used for some breathing conditions, can slow the progression of Parkinson’s.
Testing a treatment or activity
Ages 35 years to 75 years · Does not accept healthy volunteers
China
Researchers combine movement measurements and computer analysis to improve assessment of responses to levodopa in Parkinson’s and related conditions.
Learning by observing or collecting information
Ages 50 years to 75 years · Does not accept healthy volunteers
Netherlands
Researchers test whether a smartphone exercise app can increase everyday physical activity in people with Parkinson’s over 12 months.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Netherlands
Researchers combine detailed brain scans and recordings of magnetic signals from the brain to study networks involved in deep brain stimulation.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Antigua and Barbuda
Researchers investigate the safety and effects of giving tiny particles released by donated umbilical cord-derived cells through the nose for Parkinson’s.
Testing a treatment or activity
Age range not listed · Does not accept healthy volunteers
China
Researchers test a method for detecting alpha-synuclein, a protein linked to Parkinson’s, in samples such as saliva and urine.
Learning by observing or collecting information
Ages 18 years to 80 years · Also accepts healthy volunteers
Spain
Researchers are comparing donepezil with placebo over a year in people with Parkinson's.
Testing a treatment or activity
Age range not listed · Ask the team who can join
Romania, United Kingdom
Researchers assess questionnaires in different countries to measure changes in mental and emotional symptoms and feelings of shame in Parkinson’s.
Learning by observing or collecting information
Ages 30 years to 75 years · Does not accept healthy volunteers
United States
Researchers investigate automated speech analysis, wearable activity sensors and camera-based measurement of tremor for monitoring Parkinson’s at home.
Learning by observing or collecting information
Ages 50 years to 110 years · Does not accept healthy volunteers
Egypt
Researchers investigate the safety and possible effects of a probiotic and prebiotic fibre combination alongside usual Parkinson’s treatment.
Testing a treatment or activity
Ages 45 years to 65 years · Does not accept healthy volunteers
Czech Republic
Researchers compare combined strength and aerobic circuit training with aerobic exercise alone in people with Parkinson’s.
Testing a treatment or activity
Ages 18 years to 75 years · Does not accept healthy volunteers
Czech Republic, Switzerland
Researchers investigate automated voice analysis to help manage speech difficulties related to Parkinson’s and implanted brain stimulation treatment.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Austria, Germany, Israel, Italy + 4 more
Researchers record routine throat examination findings and swallowing difficulties in people with conditions affecting the brain and nervous system.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers investigate light therapy directed towards the front of the brain for movement and thinking symptoms in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 80 years · Does not accept healthy volunteers
China
Researchers study the brain mechanisms linking deep brain stimulation and sleep difficulties in Parkinson’s.
Learning by observing or collecting information
Ages 19 years to 80 years · Does not accept healthy volunteers
Italy
Researchers test rehabilitation using a robotic device for shoulder, elbow and wrist movement, strength and coordination in Parkinson’s.
Testing a treatment or activity
Ages 30 years to 80 years · Does not accept healthy volunteers
Sweden
Researchers investigate physical activity in people with Parkinson’s, with an interest in independence and participation in everyday life.
Learning by observing or collecting information
Age range not listed · Does not accept healthy volunteers
China
Researchers compare capsules containing donated gut microbes with inactive capsules to test effects on constipation in people with Parkinson’s.
Testing a treatment or activity
Ages 40 years to 75 years · Also accepts healthy volunteers
United States
Researchers use wearable devices to study sleep in the everyday lives of people with Parkinson’s.
Learning by observing or collecting information
Ages 18 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: 2026-10-13
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.