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
- NCT04977076Recruiting
Stopping versus continuing blood thinner during heart catheter procedures
This study compares whether you should temporarily stop your blood thinner (DOAC) or keep taking it when you have an elective heart catheter test or procedure (coronary angiography or PCI). It aims to see which approach is safer and better for preventing bleeding and clotting around the procedure.
Heerlen, LimburgAges 18 years+ - NCT04931160Recruiting
Study for suspected Sjögren’s disease diagnosis
This study follows people who may have Sjögren’s disease to better understand how to diagnose it. If you have symptoms like dry eyes or dry mouth, this could help researchers confirm the diagnosis and learn what tests best explain it.
BrestAges 18 years+ - NCT04984447Enrolling by invitation
Imaging the small intestine using a tube through the nose
This study uses a thin tube placed through the nose to take pictures of the small intestine. It aims to improve how the gut can be safely viewed without traditional scopes.
Boston, MassachusettsAges 18–60 - NCT04937868Recruiting
Guiding CT scans for belly and pelvis injuries after blunt trauma
This study looks at how to make a better decision tool for when to order a CT scan of the belly and pelvis after a blunt injury in the emergency department. It aims to help clinicians choose the right patients for imaging during the first evaluation.
Los Angeles, CaliforniaAges Any age - NCT04978948Recruiting
Study of a blood protein level in autoimmune disease
This study looks at how a specific protein on cell surfaces (called STIM1) appears in people with autoimmune diseases. The goal is to understand what affects this protein and how it may relate to autoimmune illness.
Brest, BrestAges 18–99 - NCT04957095Recruiting
Testing brain wiring signals during planned deep brain stimulation
This study looks at how brain networks work during a procedure used to treat movement symptoms in Parkinson’s disease. It may help researchers better understand the brain signals involved, which could improve future deep brain stimulation planning.
Dallas, TexasAges 18–89 - NCT04971720RecruitingPhase 2/Phase 3
Personalized blood pressure timing therapy for some adults
This trial tests whether timing blood pressure medications (based on your natural daily body rhythms) can improve blood pressure control. It’s designed for adults with moderately high blood pressure and focuses on who may benefit from a more precise schedule.
Birmingham, AlabamaAges 18 years+ - NCT04982965RecruitingEarly Phase 1
Study brain changes behind cannabis pain relief
This early study looks at how the brain may respond to cannabis to reduce long-lasting lower back pain. You may be asked to follow strict rules about cannabis, opioids, and safety checks (including MRI) to help researchers understand the brain mechanisms.
La Jolla, CaliforniaAges 21–65 - NCT04099823Recruiting
MRI study of spinal fluid flow in memory or balance problems
This study uses MRI to look at how spinal fluid moves inside and around the brain. It aims to better understand conditions that can affect thinking, memory, balance, and coordination—such as normal pressure hydrocephalus—or compare with healthy people.
Rochester, MinnesotaAges 18 years+ - NCT04905238Enrolling by invitation
Sleep apnea study linking breathing markers to memory changes
This trial looks at how severe sleep apnea breathing patterns relate to body “biomarkers” linked to Alzheimer’s disease, using blood or other measures. It may help researchers understand whether sleep apnea is connected to memory and brain health—and who might benefit most from better sleep care.
Palma, Balearic IslandsAges 18–65 - NCT04927429Recruiting
MRI study to improve heart imaging
This trial helps develop and fine-tune MRI scans that look at the heart and blood vessels. It may help people with heart-related symptoms or conditions by improving how MRI images are created and interpreted.
Washington D.C., District of ColumbiaAges 18–100 - NCT04888923Recruiting
How environmental exposures affect your health
This study observes how your body responds to environmental exposures or injuries over time. It aims to understand how different factors like genetics or lifestyle affect your health.
Research Triangle Park, North CarolinaAges 18–90 - NCT04927416RecruitingPhase 2
Ga-DOTATATE PET/CT scan in metastatic thyroid cancer
This study tests whether a specific special scan (68-Gallium DOTATATE PET/CT) can help doctors better see where thyroid cancer has spread. It focuses on certain types of thyroid cancer and compares how well the scan images metastases.
Bethesda, MarylandAges 18–98 - NCT04895436RecruitingPhase 2
Oral venetoclax plus IV obinutuzumab after prior CLL treatment
This trial tests whether adding oral venetoclax together with an IV antibody called obinutuzumab can control CLL when the disease comes back after a specific prior treatment. It also looks closely at side effects to see what changes in “disease activity” and safety to expect.
La Jolla, CaliforniaAges 18 years+ - NCT04876339Recruiting
Sound-based training to improve walking after brain illness
This study tests whether using special sounds (sonification) during gait training can improve walking for people with stroke, Parkinson’s disease, or multiple sclerosis. It may help your walking speed, stamina (fatigue), and overall walking pattern.
PaviaAges Up to 80 years - NCT04916340Recruiting
Exercise program study for heart blood vessel function and anxiety
This study tests whether an exercise training program can improve how well blood vessels work in people with PTSD or generalized anxiety. You may be placed into a PTSD, GAD, or healthy control group based on questionnaire scores.
Richmond, VirginiaAges 18–35 - NCT04856488RecruitingPhase 3
Lugol’s iodine solution before thyroid surgery for overactive thyroid
This trial tests whether taking Lugol’s iodine solution before thyroid surgery is safe and helpful for people with Graves’ disease or toxic nodular goiter (overactive thyroid). It may be aimed at improving surgical readiness and outcomes by reducing thyroid activity before the operation.
Solna, Stockholm CountyAges 18–75 - NCT04916210Recruiting
Study how stroke type affects thinking and recovery
This study looks at what predicts memory and thinking problems after different types of stroke or brain bleeding, and how blood-vessel changes relate to recovery. You may be invited if you recently had a stroke/bleed and can complete a baseline check within 6 weeks.
Phoenix, ArizonaAges 18 years+ - NCT04856059Recruiting
MRI study for early heart changes in Fabry disease
This study looks at early structural and tissue changes in the heart using a special type of MRI scan in adults with Fabry disease. It may help doctors understand changes earlier and better track heart involvement over time.
Toronto, OntarioAges 18 years+ - NCT04864145Recruiting
Valve procedure trial for severe leaking aortic valve
This trial studies a less invasive heart valve procedure that places a new valve through a catheter, to treat severe leakage of the aortic valve. It may help people who have symptoms or heart enlargement and who are at higher risk for open-heart surgery.
Nanjing, JiangsuAges 60–90 - NCT04875325Enrolling by invitation
Monitoring for pancreatic cancer coming back after surgery
This study looks at a standardized plan for check-ups to detect pancreatic cancer returning after surgery. It may help find recurrence earlier and guide what follow-up care you might need next.
Nijmegen, GelderlandAges 18 years+ - NCT04912531Recruiting
Virtual reality and smell tools to ease surgery pain
This trial tests whether a combination of virtual reality and guided smells can reduce pain and anxiety around major heart and chest surgeries. If you’re scheduled for one of the listed operations, the study may help make recovery feel more comfortable by using sensory-based distraction.
Boston, MassachusettsAges 18 years+ - NCT04896606RecruitingPhase 1/Phase 2
Matched donor immune therapy for mild to moderate COVID-19
This early-phase study tests immune cells from a matched family donor (made to target the COVID-19 virus) to see if they can help people with mild-to-moderate COVID-19 who are hospitalized and at higher risk for getting sicker. It aims to check safety first and also look for signs of benefit.
Valhalla, New YorkAges 18–65 - NCT04916327Recruiting
Exercise program study for mental health and blood vessel health
This study tests whether an exercise training program can improve how well your blood vessels work in people with certain mental health conditions. You may join as someone with PTSD, someone with generalized anxiety, or as a healthy control group.
Richmond, VirginiaAges 18–35
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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.