Clinical trials
General Population (no Specific Condition or Disease) clinical trials
Below are recruiting general population (no specific condition or disease) clinical trials, each written for real people, not researchers. We’re tracking 10,548 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04661280RecruitingPhase 3
Donepezil compared with non-drug care for Alzheimer’s
This trial compares donepezil (a medicine for Alzheimer’s symptoms) against a non-drug treatment plan. It aims to see which approach helps people with Alzheimer’s who still have measurable thinking ability and specific Alzheimer’s test results.
ParisAges 50 years+ - NCT04650932Recruiting
Study tests new stimulation settings for advanced Parkinson’s
This study looks at whether changing how deep brain stimulation (DBS) pulses are delivered can improve symptoms in people with advanced Parkinson’s disease. You may be eligible if you already have a specific Boston Scientific DBS device and have had it implanted for at least 3 months.
Sacramento, CaliforniaAges 18 years+ - NCT04604418Recruiting
Tracking outcomes during non-heart procedures in children with heart defects
This study looks at how children with congenital heart disease do during routine non-heart procedures, including medical or minor treatments that are not heart-related. It also measures how much health care they use afterward, which may help improve care planning for families.
Los Angeles, CaliforniaAges Up to 21 years - NCT04654000Recruiting
Rheopheresis to treat painful skin damage in calciphylaxis
This trial studies whether a treatment called rheopheresis, added to standard care, can help people with calciphylaxis whose skin wounds are getting worse. It may be considered when ulcers or dead (necrotic) skin appear despite conventional treatment.
AngersAges 18 years+ - NCT04639336Recruiting
Pompe disease study of brain and nerve effects
This study looks at how Pompe disease affects the brain and nervous system. You may be able to join if you have a confirmed diagnosis of infantile or late-onset Pompe disease and agree to participate.
Durham, North CarolinaAges birth–18 years - NCT04126018Recruiting
MRI scan comparison for certain leaking or narrowed heart valves
This trial studies how well different MRI images can assess heart valve problems—like leaking (regurgitation) or narrowing (stenosis). It may help doctors get clearer information, especially in people who may not respond well to cardiac resynchronization therapy (CRT).
Cleveland, OhioAges 18–90 - NCT04528082RecruitingPhase 3
Apremilast for children with frequent mouth ulcers from Behçet’s disease
This study tests apremilast to help reduce active, recurring mouth (oral) ulcers in children with Behçet’s disease. It may help if your child has had repeated mouth ulcers despite at least one non-biologic treatment.
BronAges 2–17 - NCT04545502Recruiting
Study of aortic grafts and heart patches after aortic surgery
This study looks at how well certain aortic grafts and cardiovascular patches work after surgery. It may help by improving care for people who need these devices, and by collecting safety and outcome information over time.
Aurora, ColoradoAges 18 years+ - NCT04576793RecruitingPhase 2
Imaging brain inflammation in Alzheimer’s and related variants over time
This Phase 2 study uses repeated brain MRI scans to track “microglial activation,” which is a marker of brain immune/inflammation activity, in different Alzheimer’s-related conditions. It may help researchers understand how brain inflammation changes over time and differs between people with these clinical variants.
New York, New YorkAges 50 years+ - NCT04580225Recruiting
Tested partial wrist fusion with or without bone removal
This study compares two surgical options for certain types of advanced wrist arthritis—one with partial wrist fusion alone, and one with partial wrist fusion plus removal of a small wrist bone. It may help find which approach works better for pain and function after surgery.
Calgary, AlbertaAges 18–75 - NCT04591587Enrolling by invitation
Corneal lenticule implant for keratoconus
This trial tests a new surgical procedure using a small piece of corneal tissue (a lenticule) from a donor to strengthen the cornea in people with progressive keratoconus. The goal is to help stop the disease from getting worse.
PristinaAges 20–40 - NCT04570085RecruitingPhase 3
Caffeine treatment to improve thinking in Alzheimer’s disease
This trial tests whether changing caffeine intake can improve thinking and brain function in people with Alzheimer’s disease. You may qualify if you can follow a low-caffeine diet and have stable Alzheimer’s treatment and sleep/heart conditions.
AmiensAges 50 years+ - NCT04575337Recruiting
Biomarker study to help detect Alzheimer’s early
This study looks for brain/biological “signals” (biomarkers) that may identify Alzheimer’s disease earlier, including stages before clear symptoms. You may be followed for about 5 years, with repeated memory and thinking testing to see how these signs relate to future diagnosis.
Beijing, Beijing MunicipalityAges 18 years+ - NCT04532346RecruitingEarly Phase 1
Hydroxychloroquine for genetic lung disease in children
This early-phase trial studies whether hydroxychloroquine can help children with certain genetic causes of interstitial lung disease (lung scarring/inflammation). It is designed for kids who are currently stable and have not recently taken hydroxychloroquine.
Shanghai, Shanghai MunicipalityAges 1 month–18 years - NCT04571658Recruiting
NEPTUNE Match study linking you to possible kidney research trials
This study is an add-on process that uses information from the NEPTUNE kidney study to see whether you might be able to join other kidney research trials. It may help connect eligible people with appropriate new treatment studies when they become available.
Atlanta, GeorgiaAges 1–80 - NCT04575883Recruiting
Bike interval training for teens with repaired heart defects
This study tests a structured “interval” bike exercise program to see if it’s safe and helpful for teens with certain repaired congenital heart conditions. It may help improve fitness while closely monitoring heart symptoms during training.
Edmonton, AlbertaAges 10–18 - NCT04397159Recruiting
Exercise program to reduce tiredness in some kidney patients
This trial studies whether doing a combination exercise program can reduce “fatigability,” meaning feeling unusually tired or weak during activity, in Veterans with moderate-to-advanced chronic kidney disease. It also compares results with people without kidney disease and checks for safety, especially for heart and joint health.
Washington D.C., District of ColumbiaAges 50–85 - NCT04440254Recruiting
Long ECG monitoring for Fabry disease heart rhythm
This study checks how your heart’s electrical rhythm looks over a longer period using an ECG (a heart rhythm recording) in people with Fabry disease. It may help doctors understand heart rhythm changes better so future care can be more tailored and safer.
Paris, ParisAges 18 years+ - NCT04419870Recruiting
Acute infections in people with mitochondrial disease
This study looks at how people with mitochondrial disease respond to acute infections like COVID-19 or the flu. It aims to understand how infections affect the body and to find better ways to care for patients.
Bethesda, MarylandAges 2 months–115 years - NCT04450927Enrolling by invitation
Collecting health data from NHLBI patients and donors
This study collects information about standard care for people seen by the NHLBI, and also about donors. It helps researchers understand what happens in real-world care, which can improve future treatment decisions.
Bethesda, MarylandAges 2–120 - NCT04398628Recruiting
Study of non-cancer blood disorders in people with bleeding or clotting
This study follows people with inherited or acquired non-cancer blood disorders to better understand symptoms, causes, and how different treatments work over time. You may be placed into a disorder-specific group, depending on your diagnosis and testing results.
Phoenix, ArizonaAges Any age - NCT04400604Recruiting
Study of liver disease risk from heavy alcohol use
This study looks at people with heavy alcohol use who may have alcohol-related liver damage. It aims to better understand liver disease risk and how it changes over time, using blood tests, some scans, and possibly stored tissue.
LilleAges 18–75 - NCT04393701Recruiting
Testing newborn blood spots to check for rare storage diseases
This pilot study tries a systematic way to look for several rare “lysosomal storage” diseases in newborns using a specialized lab test on routine blood samples. It may help detect these conditions earlier so treatment can start sooner if needed.
CaenAges 1 day–4 days - NCT04427163Recruiting
Study of health differences using blood and data profiles
This study looks at how people’s health and disease risk show up in multiple types of information collected together (like blood-related measures and other data). It may help researchers understand what patterns are linked to health versus future disease.
OlomoucAges 18–68
Hear when a new General Population (no Specific Condition or Disease) trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for general population (no specific condition or disease)?
- Yes. Clin2 currently lists 10,548 recruiting general population (no specific condition or disease) studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a general population (no specific condition or disease) trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a general population (no specific condition or disease) trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.